Gm Alternator Overcharging

5 volts which is still high, any ideas on what else to check, could the alternator itself be bad, i thought the. I only ran for a few secounds. The voltmeter across the battery is a good quick check but really tells nothing about the alternator. Now take a look at what is going on at the battery end. 89) Fuse Box, late model (MGB! Jun. battery discharge completely, the alternator can possibly recharge with enough current to overload the wires. From buying research to owner support, join 1. The alternator appears to be identical to the original. Have charging system checked before replacing alternator. P2501 OBD-II Trouble Code: Generator Lamp/L-Terminal Circuit High. I can verify that it is overcharging because my battery is boiling. How could an alternator be modified to be 120v 60 Hz. If the output voltage reading is 16 volts or higher, there's an overcharging problem. Known for its top-notch performance, great quality, and attention to style, your Corvette doesn't have a competitor. Even worst-case, with all. What the P2500 code means. If the small control wire on the side of the alternator is disconnected the alternator quits charging and the slippage and squeal stops. This allows the regulator inside the GM alternator to sense the battery state and adjust the amount of amperage output to keep from killing your battery. Lightweight Lithium Ion starter battery, 1. To be clear, GM's RVC systems use alternators with field currents that truly are controlled by logic external to the alternator. I have a 2006 Buick LaCrosse with the 3. The fan is a different problem all together, and may be contributing in some way (don't have a suggestion how at this point). Known for its top-notch performance, great quality, and attention to style, your Corvette doesn't have a competitor. Insert it in the alternator. Everything seems fine tho, just seems to be overcharging if anything. 2 CTDi alternator generator used. There are many ways to charge a camper’s battery. Powermaster supplies its alternators with pulleys matched to the alternator’s power curve. The alternator appears to be overcharging, and connecting wires that run to the battery cables are warm. up to 1969. It is also good because it starts up at a lower shaft RPM than any other Delco alternator. The factory alternator output ranged from 28 amps on the early cars, to 45 amps on the later cars. How to Test an Alternator. The voltmeter across the battery is a good quick check but really tells nothing about the alternator. It's a marine type with screens to prevent an exp. the battery is sitting at 12. The most common pulleys on GM, Ford and Daimlier/Chrysler vehicles are the 6-groove 2-7/16, 2-3/8 and 2-1/4 inch pulleys, by reducing the pulley size to 2" or 1-7/8" your alternator will start producing power sooner and produce more power cruising down the boulevard or on the highway. It is also possible that there is a problem with the fusible link or the alternator fuse for the charging system. The Alternator needs to be charging the battery between 13. This is why it is never a good idea to drive your car after your alternator has died. The problem would be overcharging the battery through the separate charging wire, as voltage at the back of the alternator could be over 16 volts. However, advantage of the THREE-WIRE system over the ONE-WIRE system is exactly why we made our part#ALT-1, alternator wiring kit, beginning back in 1989. The charging voltage should be between 13. ALTERNATOR INSTALLATION, Any Style - AC-201. These alternators are designed for direct fit, bolt-in replacement and plug into the factory wiring harness. 2001 ECSB 4x4, 5. Without the alternator, the battery will eventually discharge. This is one video subject I haven't seen yet so here it is. The voltmeter across the battery is a good quick check but really tells nothing about the alternator. It has been replaced twice, and is having. 48v Alternator 48v Alternator. Sounds like either a bad connection in the wiring, or a faulty alternator. is it possibly in the ignition? points look good. when the alt was overcharging and i turned truck off, it started 3 hours later with no problem. Could be a number of problems. How can you fix an alternator that is overcharging? If an automotive alternator (Question misses the assertion of where the alternator is, and what drives the alterntor), is deemed to be ‘overcharging’, then you need to look at all of the things that can cause a reduction in current. Chris Craft 1,744,437 views. Shame on gm for ignoring these major issues for the sake of doing major repairs on so many affected vehicles. This usually indicates a bad voltage regulator. 1 is fuel economy mode. All that is done internally by the alternator voltage regulator. It can affect sensitive electronics. Installation went smoothly with no indication of any problems. Does it check the vehicle’s voltage internally or from an outside source? The PDF shown here is for a GM. Product Details. The P2500 diagnostic trouble code is an indication that there may be a problem with your charging system. after install new alt and battery,dash,running and most all interior lights now only work when car is running. lastly, if the sense wire is left unconnected it will allow the alternator to overcharge the battery so hook it up! Good luck. When the computer screws up, the alternator charges as high as 18+ volts and boils the battery to death. LS1 alternator problems. Have a 2005 altima 2. Now it's charging 12. The voltage regulator is part of the alternator. Alternators are cheap for these trucks, cheaper than that Delco 12Si you want to make fit. Now the idle is off and the temperature gauge is acting crazy and shutting down the acceleration intermittently. 200 (2 BBL. Battery overcharging is a common problem in vehicles. An Alternate Alternator (CC Reporter Jun. Keep in mind with colder temps, the alternators will put out higher than "normal" voltage to drive a charge into the battery. by Dan Masters, [email protected] It will run at about 14 to 15. where was the voltage measured from (test terminals)? the automobile alternators were designed to put out a maximum of 16 volts unregulated assuming the battery is connected, engine running and the belts is tight and in good condition. Sometimes it will be at 12. 9 Volt set point, Self Exciting For: Delco 10SI, 12SI, 15SI, 17SI, 27SI/Type 100, 205 Series Alternators Part # D10SE81- 8 Volt Voltage Regulator for GM 10, 12,15,27 Si series alternators. Also, make sure you get an alternator for an automatic (75amp) at a MINIMUM, the GVR4 alternator (90amp) are the best to get. Another note is that, of course, alternator output is determined by the rpm of its armature. Too much power coming from it may cause overcharging problems in the battery, and a low output obviously poses undercharging issues. 10SI & 12SI Alternators, built by Delco Remy This feature contains; Visual Identification, "Clock Positions," AMP ratings, Part numbers and data to help choose the correct alternator, and differences between these models are shown in photos. Last year he replaced first the battery-- thinking that was the problem -- then the Alternator, because, as it turned out, it wasn't charging. If your Datsun came with I/R alternator, and you simply replace it with an externally regulated alternator, it will be stuck ON and overcharge! To make this work, you will need to create a sub-harness with wiring for an external voltage regulator. The GM units can produce 55 or more amps. Therefore we have no reason to slant this story. Once the alternator begins charging you can disconnect that wire and it will continue to charge until you shut off the engine. Get home or to a service. 25+ and noticed the battery was actually bubling acid from the caps. 1 x A/C Compressor with Clutch (Pre-Pag 46 Oil inside). Using digital multimeter for testing of automotive charging system (photo credit: Rick's Motorsport Electrics via Youtube) Perhaps the most important tool you’ll use in troubleshooting auto electrical systems is the multimeter, usually digital. Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Re: Alternator Overcharging? Jan 16 2013, 3:52pm Keep in mind with colder temps, the alternators will put out higher than "normal" voltage to drive a charge into the battery. the alternator output must be very evenly matched to the equipment requirements. If this warning lamp lights up while the engine is running, it means that there is a problem in the charging system, usually an alternator that has stopped working. Call 1-888-254-7261 for more information. The battery gives power to the starter and once the engine has started up, the generator/alternator takes over. Failed alternator diodes, while rare, often reveal themselves as a whining noise in the alternator, accompanied by a loss of charging voltage. Headlights and dashlights dim and get brighter. After reassembling it seems to be working fine now. I have had the alternator and regulator bench tested and they were fine, but I have now replaced both with no improvement. It sounds like to me your new-ish battery may have gone bad. But sence the alternator is smoking when you hook up the other cars battery then you know that the power is getting to the alternator threw the wiring, so the wiring is probably fine. I have an GEN IV E38 ECM running my 408 LS. The alternator cannot work as engineered if there is a significant voltage drop in the feed wire between the alternator and the battery positive (+) terminal, or between the alternator case, its ground back to the battery negative (-) terminal. I always thought my truck's alt was putting out too much, about 15-16 volts most of the time, settles to 14-14. com and enjoy Fast & Free shipping on many items!. when the alternator is overcharging the battery it is because the alt is either bad of the voltage regulator in it is bad. You can find lots of info on CS144 alternator. The alternators that were available were all 12v negative ground and some of the old cars including the Model A Fords were built as 6 volt positive ground. The Big Switch is a heavy-duty battery kill switch that complies with OSHA 1910. As mentioned before there is a voltage drop in the stock black/white ignition/sense lead. levig14 · Registered. Alternator / Generator Boot. 2015 Acadia maybe 2500 miles. See all problems of the 2018 GMC Acadia. condenser? it was getting 18 volts for. P2501 OBD-II Trouble Code: Generator Lamp/L-Terminal Circuit High. This is not a condemnation of the one-wire alternator. if i turn the car on, it goes down to 12. It is the precise 1. Sometimes the battery light on the dash lights up and the car seems to lose power and wont idle. You will have to replace the whole alternator or go to a repair shop and have them replace the regulator. Joined Jan 10, 2011 · 69 Posts. Diagnosing Computer-Controlled Charging Systems. Now when it acts up it sets a bunch of codes and windows and locks won't work. Re-manufactured and replacement alternators are larger in size and offer a higher output than stock alternators. So, as he is a good mechanic, diagnosed it saying that the alternator is overcharging the battery causing the bubling and associated oddities. Indmar’s 5-Year Factory Warranty is administered directly through Indmar Products, Inc. In some cases, however, the alternator can actually drain the battery, causing significant problems. Once the engine is shutdown, the alternator De-energizes and when you restart the engine you will need to push the button again to energize the. Check voltage at idle. Hmmm, At fast idle it's pegged at 60 amps out. This is the same whether it is a 1-wire or a conventional alternator. Now it's my turn! I have rechecked all the connections and as far as i can tell they are correct. At the other extreme, a battery that is sulfated due to being undercharged or not seeing constant use will maintain normal charging voltages. So, if the lamps lights then look for an under voltage or over voltage symptom, or perhaps a wiring fault. Save money from buying a new battery with our in depth guide on how to recharge your battery. Overcharge is mostly likely the cause of a faulty voltage regulator in the alternator. The most common pulleys on GM, Ford and Daimlier/Chrysler vehicles are the 6-groove 2-7/16, 2-3/8 and 2-1/4 inch pulleys, by reducing the pulley size to 2" or 1-7/8" your alternator will start producing power sooner and produce more power cruising down the boulevard or on the highway. If Your Alternator Passes. We are having a problem with the alternator in this vehicle overcharging. GM alternator wiring GM alternator wiring. Voltage drops on the negative side can cause overcharging. Rechecked all wiring. At the battery end the voltage is just 13. It is also good because it starts up at a lower shaft RPM than any other Delco alternator. We tested the charging system after installing the new battery and everything came back ok. In this condition, the field current is near zero so the field is not magnetized and does not induce a signal into the stator windings. The alternator solves a lot of the problems associated with the generator by creating the charge current in the stationary alternator housing, and using the rotating part, called a "rotor" to generate the magnetism needed to induce a current. Mercruiser Charging System, Alternators, Voltage Regulators and Parts If you need help finding the right part give our techs a call 1-800-998-9508. A high-current one-wire alternator with a proper voltage regulator will not overcharge a battery. The alternator stator in my Honda GL500I Silverwing was replaced with a new one (mfg. Includes Versa Note. Low maintenance batteries 13. The Raptor Series is an exclusive line-up that defies every challenge, especially the test of time. Yep, this is a classic voltage regulator symptom. As heat within the alternator increases, the electrical resistance in the alternator also increases, which reduces the alternator's charging capacity. 2015 Acadia maybe 2500 miles. Another note is that, of course, alternator output is determined by the rpm of its armature. If a heavy load is placed on the alternator, the current flow will cause a voltage drop across the alternator wire. At idle, small changes in the alternator’s speed can make a big difference, so the pulley ratio becomes very important. No matter what vehicle you drive, we have a battery disconnect switch to safely protect your car, truck, heavy-duty equipment, RV, or boat from theft or electrical fire. It was loose. Schematics And Real World So You Can Identify Parts & What They Do. With a corroded cable going back to the battery, the alternator's output voltage and current never got to the battery and it never got to the Engine Computer / voltage regulator to be seen by them. So I am working on a older GM product today. It has an externally mounted voltage regulator that also holds the brushes. The internal regulator will try to maintain the proper voltage at whatever point in the system the sense wire is hooked up. Which in turn causes problems with other things in my car. Find helpful customer reviews and review ratings for TRAIL-GEAR GM Alternator to Toyota 22r/22RE Motor Bracket at Amazon. 1) If voltmeter reading indicates overvoltage (more than 2. i measured the alternator, by touching the negative to the valve cover bolt, and the positive to the red wire terminal on the back of the alternator. If you allow this to continue very long, it will ruin the battery and burn out the alternator as well. Deep cycle battery faq and battery information is on this non-commercial web site. The voltage regulator in a car is not quite the same thing as the voltage regulator in (say) a power supply. Diagnosing Alternator Charging System Problems Over the years Harley Davidson has used many different alternator systems. It was introduced on the 1969 Corvette, and by 1973 most GM built cars and light trucks used this model alternator. The alternator cannot work as engineered if there is a significant voltage drop in the feed wire between the alternator and the battery positive (+) terminal, or between the alternator case, its ground back to the battery negative (-) terminal. NOTE Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Alternator (12 volt) Item#: A-10001-A12. Known for its top-notch performance, great quality, and attention to style, your Corvette doesn't have a competitor. I'm having a overcharging issue with my alternator on a mercruiser v8. A "whine" from the radio is usually due to bad filter cap's in the alternator (or elsewhere) that allow the electrical noise to be picked up by the radio. 7 volts, but only if engine is rev'd over 4500 RPM for 3 seconds. In speaking with Jon Haas from Pantera Electronics, he convinced me to replace my stock Motorcraft alternator with the GM si12 model. When the computer screws up, the alternator charges as high as 18+ volts and boils the battery to death. From buying research to owner support, join 1. You will have to replace the whole alternator or go to a repair shop and have them replace the regulator. Since the problem occurs with 2 different alternators, this component can be ruled out as the reason for the overcharge. The voltage regulator is part of the alternator. Overcharge Symptoms 2-1 2-2. to put out more voltage. Learn about what advanced microsatellite instability-high (MSI-H) and dMMR cancers are, including how a test for MSI-H and dMMR cancers works. A shorted or old battery can cause premature failure of the charging system so it's a good idea to replace the battery at the same time as the alternator if it is three years or older. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. LS1 alternator problems. We appreciate you - stay healthy!. Become a GM-Trucks. See all problems of the 2013 Chevrolet Traverse. It should increase Check the output at the alternator, it will be the larger wire bolted to the alternator. The alternator WILL NOT charge until the switch is thrown. Alternator Basics While modern electrical systems are generally referred to as 12-volts, in operation with the engine running voltage will in the area of 13. Shut off the ignition switch and unplug the harness connector from the alternator. 2010 FWD LT1-Gold Mist Metallic- seats 8. Insert it in the alternator. Have the battery checked and if it is okay then the fault is in the system. I noticed the big white wire connecting to alternator's main output terminal was brown at the last inch adjacent the lug that bolts to the main terminal. I'd a) get the batteries tested and replace if necessary b) swap the diode for a VSR. 3 volts, if the alternator is charging any more or less it means it can not regulate the voltage to correct level, and the vehicle performance will suffer, there may not be any specific reason behind it, there probably isnt anything you did to cause it or could have done to prevent this either, just because you have a Honda. When the alternator loses capacity or fails, the electrical systems will only stay on until the battery's reserve charge is depleted. 8 volts (14. An overcharging alternator, however, will cause the meter to remain in the high position after initial start-up. Forum discussion: Hey guys, I need some help here. The alternator is part of the electrical system of your vehicle. I hope this works as well for you guys as it has. The problem is the alternator is charging at 16-17 volts. My M887 did the same thing. I replaced the alternator with one that I got from a salvage yard (to save money) but it is still over charging at the same voltage. Back in the shop on 2/11/2019 with bad alternator again. P2501 OBD-II Trouble Code: Generator Lamp/L-Terminal Circuit High. I have seen known bad batteries and alternators test good and vice versa. Care must be taken to prevent short circuits and rapid charging. These were remanufactured alternators, we finally got a good one after trying something like 10 different ones. I just subscribed to your program and the reason I need your service is my alternator problem. 5 years of ownership (and buying brand new), already have to replace a major electrical component. I used the lead with a resistor in it, not being too concerned with the volts bulb, having a gauge. Switch off the engine and check the tension on the drive belt. The voltage regulator in a car is not quite the same thing as the voltage regulator in (say) a power supply. The alternator is part of the electrical system of your vehicle. There are 2 brushes in the alternator, each one has a field terminal, one is labeled "FLD", the other is labeled "GND". I still think alternator. This causes your battery to get a dead cell. My GM alternator nightmare continues. If the small control wire on the side of the alternator is disconnected the alternator quits charging and the slippage and squeal stops. If your old car was made by Ford, GM, or Chrysler, you will find the appropriate charging system. Classic Industries offers a wide selection of 1970 Chevrolet Nova parts, including 1970 Chevrolet Nova interior parts and soft trim, 1970 Chevrolet Nova exterior sheet metal, 1970 Chevrolet Nova moldings, 1970 Chevrolet Nova emblems, 1970 Chevrolet Nova weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Recently purchased this 2001 Seville SLS 144000 miles. 79V than it can at 14. Went to the mechanic to check levels and he says my alternator is giving it 17( watts/volts) rather than the 12-14 it's supposed to. Order your parts online or pick them up in-store at your local Advance Auto Parts. The most common pulleys on GM, Ford and Daimlier/Chrysler vehicles are the 6-groove 2-7/16, 2-3/8 and 2-1/4 inch pulleys, by reducing the pulley size to 2" or 1-7/8" your alternator will start producing power sooner and produce more power cruising down the boulevard or on the highway. Specific tests will quickly rule in or rule out the alternator as the cause of the charging problems. This article addresses the electrical adaptation of a modern alternator to an older tractor. If a heavy load is placed on the alternator, the current flow will cause a voltage drop across the alternator wire. i have a 89 dodge D250 truck with the 5. 2 ish power output from the alternator when running but its really how many amps the regulator is allowing to be put into the bat that you need to figure out cause it should be adjusting the amps as needed cause putting too many amps for too long. The alternator I installed is from Car Quest and its part number is 7078A. 80) Generator to Alternator Conversion tech day (Photos and notes). P0563 - System Voltage High. All that is done internally by the alternator voltage regulator. Having plenty of charging capacity – for example, a 200A alternator in your vehicle – will not charge things any quicker than an 80A unit if the battery (or batteries) only takes 40A. Alternator stopped working again on 2/6/2019 and replaced it on 2/7/2019. Fit a new, high-quality belt over the appropriate pulleys. 07 ratio g50 : spring rear, heavy duty, var 1 g51 : spring rear, heavy duty, var 2 g52 : spring, rr, 15000 lbs g5o : spring rear, heavy duty, var 1. Item came of 2007 Honda Accord RHD (right hand drive) vehicle. (2) The second important consideration of the typical Muscle Car period factory system is the effect of the long battery charging wire (which routes from the junction to the battery). In 2000 the alternator hooks to the battery and feeds the external power bus. Tricks that service advisors and mechanics use to upsell unneeded work and overcharge for repairs at car dealerships. If your Datsun came with I/R alternator, and you simply replace it with an externally regulated alternator, it will be stuck ON and overcharge! To make this work, you will need to create a sub-harness with wiring for an external voltage regulator. Hmmm, At fast idle it's pegged at 60 amps out. Save money from buying a new battery with our in depth guide on how to recharge your battery. Fit a new, high-quality belt over the appropriate pulleys. Detroit Diesel Starters Motors for 53, 71, 92, 149 & 60 Series. An Alternate Alternator (CC Reporter Jun. Battery overcharging is a common problem in vehicles. Keep your car running as smooth as possible by swapping out your old alternator for a new Chevrolet Corvette alternator from AutoZone today. 79V than it can at 14. If you have an alternator that comes off and there appears to be a lot of dust on the front of it-mostly on the fan blades of the alternator, it's because there is, it's belt dust because the belt. Overcharging your battery can significantly decrease its lifespan, make it more difficult for it to turn over, lower its efficiency and in extreme cases can even lead to battery explosion. Therefore we have no reason to slant this story. By Dan Marinucci. The price of a new alternator can run from $500 to $1,000. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Its key role is to provide power to operate the starter, ignition and all of the electronic accessories in your car. However, make sure to connect the negative terminals on both batteries to the factory negative line going back to the block. 5200 Super B. An overcharging alternator can kill a battery and boil the fluid out of it. Everything seems fine tho, just seems to be overcharging if anything. Alternator/Charging Problem- 1998 GMC Jimmy 4. Sunday morning overcharging to 15. This video will cover the following ----- How to test an alternator using multi meter How to replace an alternator How to diagnose alternator charging issues Alternator ripple test How to test a. The power steering pump is mounted on the "Alternator Bracket" AC/Delco pn# 14103106. It had a bad regulator, which is the part that controls the output of the alternator. I'm going to spray some maf cleaner on the elec. If a heavy load is placed on the alternator, the current flow will cause a voltage drop across the alternator wire. Take tha alternator down to the parts store and have it tested. Ive allready posted. The engine is swapped into a 2001 Chevrolet S10. The alternators were bought from O'Reilly's auto parts. Wide availability, high output, and robust durability make the Ford-Motorcraft 3G integrally regulated alternator the easiest and best choice for replacing old, low-output Ford 1G externally. Trying to figure out an alternator overcharging issue. Today, I went to get a new battery as the one it had had a lot of leaking acid underneath it. I liked the mod because it simplifies the wiring schematic and also throws more current (regulated) at the battery. You’ll see two things right off the bat on RVC vehicles tipping you to the presence of this latest technology: First, you’ll see a two-wire voltage regulator connection instead of the familiar four-wire connection. Tips If you notice higher voltage over a tenth or more, try cleaning the battery terminals first by removing the terminals and using a brush or other cleaning item. By Dan Marinucci. Most alternators will not be able to keep up with the load when idling and the lack of cooling compounds the problem even further. NOTE Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Generating electricity to recharge the battery, run the fuel pump, injectors and ignition system, and power all of the vehicle's lights and other electrical accessories places a substantial load on the alternator that generates a lot of internal heat. As heat within the alternator increases, the electrical resistance in the alternator also increases, which reduces the alternator's charging capacity. Installation went smoothly with no indication of any problems. If you must do this, keep a close watch on the ammeter, checking for overcharging. Remove and save the generator. General Motors BAE55050-020 1988-02 Camaro/Firebird BAE55034-020 1998-02 Camaro/Firebird BAE55014-020 1993-97 Camaro/Firebird. 0L 8V BGD engine with a new 120amp. Fuel system troubleshooting/wiring diagrams sold separately. So, as he is a good mechanic, diagnosed it saying that the alternator is overcharging the battery causing the bubling and associated oddities. The alternator solves a lot of the problems associated with the generator by creating the charge current in the stationary alternator housing, and using the rotating part, called a "rotor" to generate the magnetism needed to induce a current. the alternator output must be very evenly matched to the equipment requirements. You must look at the application that GM is using the alternator on, and calculate the shaft RPM speed (you could also just look it up on the Delco-Remy service manual). To resolve this problem you can actually wire in a external alternator regulator, which allows convenient switching to your internal regulator once your power module works. These are available in a Rebuilt 55 AMP output at most major parts outlets if you request the Ford Fiesta "Bosch" version for 1978-1980. 1) If voltmeter reading indicates overvoltage (more than 2. This system. The alternator is part of the electrical system of your vehicle. 5v dropped alarmed me not fully understanding how the system worked and with this info i would assume Auto-zone was just trying to make a sale :annoyed: well i knock out 2 birds with one stone ,new battery and rebuilt Alternator $267. The alternator appears to be overcharging, and connecting wires that run to the battery cables are warm. You can use a GM rebuilt alternator for $30 from any auto parts store that is 100 times better than the stock Lucas unit. Rechecked all wiring. The Alternator needs to be charging the battery between 13. In Summary. If a heavy load is placed on the alternator, the current flow will cause a voltage drop across the alternator wire. A linear regulator employs an active (BJT or MOSFET) pass device (series or shunt) controlled by a high gain differential ampl. Also, like most other Firebirds, the alternator will discharge. I took it to the dealership and they say the voltage is fine. GM 10si (3 wire)alternator question. Milled Pinion Symptoms 2-3 III TESTING between the alternator and the battery and back to the alternator. The battery's natural voltage is 12. It runs continuously at the ~14vdc range to continue to provide all the power the car needs as well as keep the battery charged. It has been replaced twice, and is having. Customer brought car in for battery going dead over night intermittently. I have tried two different powermaster alts and have a brand new battery , checked all connections/ grounds etc and still sending 17v to the battery. Low maintenance batteries 13. So I put my 60 amp in and it charges fine at 13. I guess this should go in this forum. We all know that Wye is very efficient. You can use it to locate faulty wiring, test electrical components, engine sensors, ignition and fuel systems and starting/charging system voltage. These systems require recalibration with a scan tool if the battery is replaced. if the voltage is higher than 16 volts, there might be a loose connection on the battery terminals or the alternator output terminal or the autolink fuse. I recently got a new battery (within the last 2 months) I find it hard to believe. The alternator cannot work as engineered if there is a significant voltage drop in the feed wire between the alternator and the battery positive (+) terminal, or between the alternator case, its ground back to the battery negative (-) terminal. In my case it was the voltage sense wire that went from the battery back to the alternator. Along with the battery, the alternator produces the electrical power needed to operate both the electrical components and engine of a vehicle. Alternators are mounted to the engine and are operated by a serpentine belt or powered by the crankshaft directly. Which in turn causes problems with other things in my car. However, if the alternator isn't working correctly, it may send too great of a charge to the battery, which is known as overcharging. The volt meter needle was 3/4 of the way over to the high side. Good Answer: You are on the right track. This causes your battery to get a dead cell. At the other extreme, a battery that is sulfated due to being undercharged or not seeing constant use will maintain normal charging voltages. Diagram #1 shows the basics of the early alternator / voltage regulator (VR) design. Ive allready posted. It has been replaced twice, and is having. It was an option with at least some 70, 71, and 72 GM cars, although it rarely showed up in those years, except for on the Corvette where it was standard equipment. 11/2013 edition. If the alternator is overcharging, there could be signs of corrosion; but the terminal may be cracked or loose. from San Antonio Texas. It sounds like to me your new-ish battery may have gone bad. The alternator appears to be identical to the original. Switch off the engine and check the tension on the drive belt. , a short, fat wire directly from the alternator to the battery, then the battery may be overcharged. Under all other usages, the wiring should not present a problem. BLUE,NORM OR ANYONE,over the weekend my 78 volt meter pegged all the way to the right side,i'm guessing at least 16 or more volts. Stamped #84169187. The reasons alternators overcharge include issues with the battery, drive belt, alternator output, external regulator and type of alternator, explains AA1Car. Alternator overcharges battery Impala How to fix an Alternator that overcharges battery Impala. Poor ground connections are an often-overlooked cause of low charging output and alternator failure. Alternator Output Ratings and the Real World The term “alternator output” refers to two distinct, yet related, concepts. The problem is the alternator is charging at 16-17 volts. Interesting that alternators use a three phase wound AC unit. How to fix an Alternator that overcharges battery Impala Shops are reporting instances where GM vehicles and specifically Chevrolet Impala alternators are overcharging the battery. Recently added items. If the alternator is not charging, with the engine running, one test you can perform is to take a small screwdriver and poke it into the small 'D' shaped hole in the back of the unit (Illustrated below) to bypass the regulator, which will put the alternator into full charge. To be clear, GM’s RVC systems use alternators with field currents that truly are controlled by logic external to the alternator. 3G alternator (130 amp) for our swap comes in large and small frame sizes small frame can be found stock in 1995 5. I have an GEN IV E38 ECM running my 408 LS. GM part # 25877026 - Alternator Thank you for your patience with potential delays in order processing and shipping as our business adapts to changes resulting from COVID-19. This is a discussion on LS1 alternator problems within the General Help forums, part of the LSx Technical Help Section category; I've burned up 5 alternators and I dont know why. I use a Normally Open Push Button. 1 kg capac. also fried my battery. Ford PCM controlled alternators will charge at a default rate of about 13. I recently replaced my battery, 2 months ago, and my Alternator on 04/09/11. Last week I found out that the alternator was overcharging (charging at around 15. Generating electricity to recharge the battery, run the fuel pump, injectors and ignition system, and power all of the vehicle's lights and other electrical accessories places a substantial load on the alternator that generates a lot of internal heat. Compare 2007 Ford Five Hundred Alternator brands. Gm claims vehicle is out of warranty and I have to pay for repair out of pocket. I bought a new one from Vans Auto and installed it today. In some instances, the alternator can produce too much voltage and overcharge the battery. Undercharge Symptoms 2-2 2-3. It must have been simpler just to provide resistor banks, given that there was no other reason for the alternator to act as a motor. Is the battery bad?" It is not the battery. repair shops, and most junkyards. It is a more generic version of what was offered in the cars originally and uses standard GM plugs, fittings, and color coding. While driving my Duramax yesterday I noticed the dash volt meter was indicating a very high rate of charge, much higher than normal mid scale (14) reading that I usually see. Check for voltage drops at the positive and negative battery cable connections, the alternator BAT+ power connection and the engine ground strap (s). Joined Jan 10, 2011 · 69 Posts. Dodge Cummons Diesel not charging or overcharging?, our voltage regulator by-pass kit and instructions plus, phone tech help. The wires from the alternator run to the starter. Mando Alternator. connector of alternator and switch batteries. Put a battery tender ( 1. The most common cause is a broken alternator drive belt. Our mission is to provide the best auto repair and maintenance in Minnesota. mines is at 14. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle. condenser? it was getting 18 volts for. 2001 ECSB 4x4, 5. Good day to all, and thanks in advance for your help. Undercharge Symptoms 2-2 2-3. You can do this by turning on every accessory possible (inside the vehicle). A voltage regulator is a device that maintains the proper spark levels on a car's alternator. Bought a reman and it was still overchargingtook it back and exchanged for another reman from Peterbilt (Delco-Remy 5SI series)hooked up the "smart sense" terminal and it still overchargesjust past 15 volts. As mentioned before there is a voltage drop in the stock black/white ignition/sense lead. This last one lasted 4 miles. A 1 wire is just an alternator that is self excited with a doide jumped accros the 2 terminals. I also noticed (before I fixed it) that the lights, and heater would both 'perk up' as I took off from a stop. The wiring harness was made by Speartech. by Stan Martin, P. In this condition, the field current is near zero so the field is not magnetized and does not induce a signal into the stator windings. Posted By: YC 1 on 05/31/10 02:12pm The "emergency bypass solenoid" located in the battery compartment is a continuos duty solenoid. 15VDC is not unheard of, I've seen it with my own truck, and the previous D***e. 16183247 "One engine service ECU module year GM control ECM International DT466E Non-EGR Diesel Engine Computer Module ECM ECU P/N:1807349C4 International DT466E Non-EGR: $350. How do I tell if its the alternator or could it be the battery causing the hi rate of charge?. This is usually a bad diode in the alternator, less often abad regulator. 2001 ECSB 4x4, 5. Overcharging and Undercharging. 856 overcharging battery. Remove and discard. by Dan Masters, [email protected] And yes, most regulators used today are solid state and inside the alternator. Revised 6-15-2015. when the alternator is overcharging the battery it is because the alt is either bad of the voltage regulator in it is bad. Scratch your head on that one! Had both alternator and battery checked. If the voltage goes up more than 2. 72 olds to be exact. This is one video subject I haven't seen yet so here it is. OAP pulleys have a one-way clutch inside the center of the pulley that slips and allows the pulley to free-wheel when engine speed suddenly drops. If the output voltage reading is 16 volts or higher, there's an overcharging problem. Battery terminal on the alternator to the #2 terminal on the alternator and positive battery cable at the starter. If the resistance is lower, e. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. I replaced it and still the same problems. I use to buy 120 amp alternators from newer caddies (1988-93) take them to my local alternator shop, have them put the 200 amp stator in for my old caddies (the only difference between a gm 120 and a gm 200 is the stator). Repair Importance Level: 3/3. Additionally, an incorrect replacement battery in the vehicle can cause an overcharging condition. But the light does behave in slightly different ways depending on the type of generator fitted to your car. It has a 350 Chevy engine in it. 1 kg capac. Our high output alternators are a direct bolt-in replacement for your original factory alternator. 5 Volts as the upper limit. The internal regulator will try to maintain the proper voltage at whatever point in the system the sense wire is hooked up. I replaced it and still the same problems. To uprate and upgrade the familiar Chrysler alternator, we used this kit from J. Switch off the engine and check the tension on the drive belt. A high-current one-wire alternator with a proper voltage regulator will not overcharge a battery. com provides a list of GM service bulletins for this car, and one bulletin shows parasitic loads for six GM vehicles (none of them TrailBlazers) that range from 11 to 28 milliamperes (. You'll see two things right off the bat on RVC vehicles tipping you to the presence of this latest technology: First, you'll see a two-wire voltage regulator connection instead of the familiar four-wire connection. To resolve this problem you can actually wire in a external alternator regulator, which allows convenient switching to your internal regulator once your power module works. Diagnosing Computer-Controlled Charging Systems. This is a Brand NEW bolt on replacement for the original Lucas 43 amp alternator with a Bosch style 95 amp unit from an eBay rebuilder, BNR Parts, in California. Then, use a ratchet to take the tension off the drive belt at the tensioner pully, slip off the belt, unbolt the two bolts that hold the alternator in place. Revised 6-15-2015. State of charge, temperature, age of batteries all have an effect on the charging rate. In most modern systems, the electrical current passing through the filament of the warning light is what energizes a circuit in the alternator to start charging. I guess this should go in this forum. It was loose. The alternator is part of the electrical system of your vehicle. 72 olds to be exact. The Alternator needs to be charging the battery between 13. 75 V that is the specified voltage for recharge. One reason why alternators have a high failure rate is because they're always working under a load. An Alternate Alternator (CC Reporter Jun. You can use a GM rebuilt alternator for $30 from any auto parts store that is 100 times better than the stock Lucas unit. alternator overcharging I have a 2002 CRV only has 4,400 miles on it. If you must do this, keep a close watch on the ammeter, checking for overcharging. 82) Battery Service and Preservation (CC-AMGBA Jun. Scratch your head on that one! Had both alternator and battery checked. Hey guys, gotta a question. com as a daily part of their ownership. Alternator (12 volt) Item#: A-10001-A12. It a voltage regulation issue. According to the diagram I have the Battery wire hooked up correctly. 8L GM vehicle is fully charged. If you have a poor connection anywhere that the sensing wire is connected to it may cause the regulator to sense a low charge and increase the field current to the alternator field causing it to overcharge. Go look at Ammeter and at idle it's at about 30 amps out. " Inside the alternator there is a field coil, which generates the charging current. This condition may be more pronounced at idle or other low RPM operations. Springs,tune kits,gunstocks,Beeman, Rws, Webley and many others. 2001 Alternator : How To ? Printable View. 88) Fuel Gauge Calibration, Thermal Type; Fuse Box (CMGBC Jan. 8 volts you may want to increase this in order to get a much higher charge current into your batteries. Shops are reporting instances where GM vehicles and specifically Chevrolet Impala alternators are overcharging the battery. A shorted or old battery can cause premature failure of the charging system so it's a good idea to replace the battery at the same time as the alternator if it is three years or older. '92 Ford Mustang GT: 385" SBF, Dart SHP 8. OAP pulleys have a one-way clutch inside the center of the pulley that slips and allows the pulley to free-wheel when engine speed suddenly drops. Ford does make internally-regulated alternators, but they didn't appear until the early 80s and didn't become 'standard' until the late 80s. It runs continuously at the ~14vdc range to continue to provide all the power the car needs as well as keep the battery charged. The alternator is driven by either an accessory belt or a serpentine belt in conjunction with the crankshaft pulley. How to fix an Alternator that overcharges battery Impala Shops are reporting instances where GM vehicles and specifically Chevrolet Impala alternators are overcharging the battery. If the alternator is not charging, with the engine running, one test you can perform is to take a small screwdriver and poke it into the small 'D' shaped hole in the back of the unit (Illustrated below) to bypass the regulator, which will put the alternator into full charge. , a short, fat wire directly from the alternator to the battery, then the battery may be overcharged. BLUE,NORM OR ANYONE,over the weekend my 78 volt meter pegged all the way to the right side,i'm guessing at least 16 or more volts. com as a daily part of their ownership. All that is done internally by the alternator voltage regulator. See reviews, photos, directions, phone numbers and more for the best Automotive Alternators & Generators in Wartburg, TN. connector of alternator and switch batteries. Battery removed for charge and test. Modern alternators offer improvement to an older tractor's charging system and cost far less. It runs continuously at the ~14vdc range to continue to provide all the power the car needs as well as keep the battery charged. Electrosport Industries) as a preventive maintenance action in preparation for a 2006 vacation trip. For example, my volts gauge buries the needle at like 17 volts when I start my car up. Joined: Jan 10, 2007 Posts: 754. OUCH ! Open the Hood and check out put , I get 18 volts across the battery ! Brilliant. And a dual terminal connector. If the alternator was allowed to constantly produce all the power it could, system voltage would rise to a damaging level, the battery would overcharge, components would be damaged, and the alternator would soon overheat and burn out. That's pretty easy to check. Overcharge is mostly likely the cause of a faulty voltage regulator in the alternator. The alternator will overcharge the remaining cells and boil the electrolyte in the other cells. When in gear and running drops as low as 8 volts. On a cold winter morning, mine all jump to 15-16 volts for the first few minutes to heat the battery. (Or Terminal Post if your vehicle is so equipped). The voltage regulator is part of the alternator. 2) If overvoltage condition disappears, check ground connections at regulator, alternator, from firewall to engine, and from engine to battery. Classic Industries offers a wide selection of 1970 Chevrolet Nova parts, including 1970 Chevrolet Nova interior parts and soft trim, 1970 Chevrolet Nova exterior sheet metal, 1970 Chevrolet Nova moldings, 1970 Chevrolet Nova emblems, 1970 Chevrolet Nova weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Remove and save the generator. Any help would be appreciated. At idle, small changes in the alternator’s speed can make a big difference, so the pulley ratio becomes very important. ) in passenger compartment. There are no third parties or insurance involvement. Dim lights. NOTE When the voltmeter is connected in parallel. I have a 2009 G8 GT with about 93,000 miles on it. You only need to push the button to excite the alternator. One day the voltage (checked with a volt meter) will be almost normal, the next too high. Alternators produce alternating current through a process known as electromagnetism. I have a 2009 chevy Silverado and just added a 250 amp alt. All of them have been putting out excess voltage at Engine rpms over 3000. The alternator I decided to use is a Delco 10SI alternator. Lubed them up and they quiteted down a bit but the alternator belt would not. The alternator pulley typically spins about two or three times faster than the crankshaft pulley to produce the power necessary at lower engine speeds, such as at idle. Fig: 3a Jumper Harness Layout - single alternator [see detail 3 for updated relay mounting]. Manual states the DIC will indicate battery not charging when low, but can this hurt my elect. You can swap the GM alternator into an early GM 4x4 or an early non-GM 4x4. This seemed to work fine on the day I fitted it, with the voltage gauge reading ~14v. To maximize the life of your Rolls AGM battery, it is important that it is properly charged. To wire an internal regulator 3-wire alternator. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional. The ECM and/or BCM remain the brains of most charging systems, but there are standalone systems as well, notably GM's Stand Alone Regulated Voltage Control (SARVC). Standard - KG4 Alternator, 150 amps Available - KW5 Alternator, 220 amps - Included with (VYU) Snow Plow Prep Package when ordered with gas or diesel engines. 817119A 4 Contact us for Proper Application 55 amp, V-belt application. If the voltage regulator malfunctions, the alternator can overcharge the electrical system and cause many of the components to fail. OUCH ! Open the Hood and check out put , I get 18 volts across the battery ! Brilliant. It was a $90 touch and does not require a voltage regulator. One wire alternator overcharging battery; If this is your first visit, be sure to check out the FAQ by clicking the link above. GM 10si (3 wire)alternator question. This happens in newer vehicles with alternators that need signals from the vehicle's electronic control unit. The alternator I installed is from Car Quest and its part number is 7078A. I checked voltage at the battery with engine running--16 volts and fluctuating wildly most of the time. And, if you want to enjoy the RV camping or a road trip, then knowing how to charge RV battery while driving, is essential. I doubt that is the case but didn't have a basis to argue with them. Aside from a dead car battery, there are other signs of a bad alternator that aren’t as, well, extreme. 6L Turbo Diesel V8 engine. The alternator is externally regulated by the computer. All used this connector design. 8 liter diesel. Re: HELP with 755 alternator and battery overcharging? I looked back at the specks you posted and it shows the voltage regulator set at 14. the red wire coming out of the alternator is putting out 12 volts but not going to the ignitinon system or battery. From buying research to owner support, join 1. Had everything fixed and yesterday acting up again. also fried my battery.