5v and drops down to 10v while driving. The battery is not charging, so the light is useful. It's easy to meter voltage drop- set to millivolts and go from alt lug to batt terminal, and so. I replaced the alternator but still no 14 volt charge. If the battery is then reading 13. If the battery was low or dead, driving for 20min will not fully charge a battery. It\'s been a while since I\'ve posted because, for the most part, I can figure this stuff out. I had a new alternator placed in my 2001 Mazda MPV about 2 months ago. Astra 2005 1. Sometimes a long slow charge will bring a battery “ back” , sometimes not. Never heard of replacing the computer for this. I'm guessing you have an 07 Caliber and not a 97 as you put in your userCP. Battery Cables not only provide needed starting amps and power for your accessories when your car is not running but they also complete the circuit of your alternator while the engine is running. A shorted diode in the alternator can still allow a charging voltage of up to 13. 8V at idle but still the battery charge light is on. 3 new batteries. I then ran 12v from a relay (tested hot) to the red wire on that harness. They charged 600$ for a new alternator (which they said was new and generic) and installed it. Next component I would change is the shop. Read honest and unbiased product reviews from our users. Grounded out the main alternator lead weaseling the alternator out. The alternator spinning fine battery fully charged but no charge going to it all fuses fine battery connection fine any ideas I'm at my wits end and skint !!!. Why is your new alternator not charging your battery? Answer. Re: why is my 1-wire alternator setup not charging? Stop disconnecting the battery with the engine running! If you disconnect the battery while running your engine you will kill your alternator in a heartbeat. From the alternator output to the ground should be at least 13. Came back with a bad voltage regulator. but it wasnt charging still so i moved it to the postive side of the starter solonoid and still no good, now its a little better, its. I can`t understand why people like you exist. For this reason you may find that poor connections or corroded wires can cause intermittent or false diagnosis for repairs. Charge it at a slow rate for an hour to see if the voltage comes up to 12. I peeled back wires connected to the post and separated each one a good few inches. How old is your car? I had a 1995 Century that had the exact oposite problem (Battery light stopped coming on wgen you turn on the key). When the battery isn't charging, the car can't run, because the battery isn't there to give enough energy to the spark plugs and ignition system. If you are getting spec voltage at the battery then it's time for a new battery. The alternator is not producing enough electricity to keep the battery fully charged. 2 volts if the alternator is healthy and charging the battery. Anyways, I got a new alternator from Advance and the repair shop put in a new battery to go with it, but when testing they found that there is no charge going to the battery from the alternator? What? They just got done checking all of the ground wiring from the alternator to the starter and from the starter to the battery and it was clean. By the way since getting new battery, battery light still on, gauge shows 12 until I drive for a minute, light goes out, gauge moves up to 15. A faulty charging/rectifier pack on the alternator would also cause your problem. New alternator new battery still won't charge - 1997 Ford expedition 6. I have 14 volts now but the DIC Battery Not Charging and the battery idiot light are still on. com Once you get full battery voltage at the alternator, if it's still not charging, recheck the voltage on the green wire. Battery cables are made of stranded wires that have an appropriate connector to fit your battery, alternator and starter. now as for the fusible link, you can use your ohm meter to measure between the positive cable (after removing it from the battery for safety (engine off) and the large red wire connection on the alternator stud. Check the cable connections or have the alternator checked. A week later the alt was not charging at all. Note: If you have a bench charger, you can charge the battery up overnight and then drive the car okay the next day (you won't harm the alternator even if it's not working). The original mechanic tried to put the alternator in but ended up taking the whole thing over to a "European" mechanic. So I bought and installed a new Denso alternator, got a new battery and still the car is not charging. ) I need to find out where that blk/yellow wire goes too. I could not remove the 80amp alternator fuse, but it looks intact, and after removing the clear plastic cover on top, it showed continuity on my meter. If your battery died while driving, then the vehicle was not running on the alternator. New Alternator not charging New Battery, Low Votage My battery is less than a year old and it passed two separate test at Kraigen and Autozone. It boiled over. Put in another new alternator and battery and the new alternator overheats. -The base alternator is still a 157A single unit on the 6. checked all fuses and connections please help. This is a brand new alternator, and the only work related to the alternator that was done prior was the installation of a new starter. (the battery should not drop below 9v or so while cranking and then return to 12+) and clean terminals are necessary. How old is your car? I had a 1995 Century that had the exact oposite problem (Battery light stopped coming on wgen you turn on the key). (209) 952-7901. They were able to test voltage and the younger person there said the battery was bad. Anyways, I got a new alternator from Advance and the repair shop put in a new battery to go with it, but when testing they found that there is no charge going to the battery from the alternator? What? They just got done checking all of the ground wiring from the alternator to the starter and from the starter to the battery and it was clean. It can be a pain, but when you find it, it will seem so simple. My job is to get everyday people back on the road in their every day drivers. I bought a new alternator and it read low voltage around 12v max. Just get a good new battery. you should use a battery charger if the battery was recently discharged. It turns out that the original alternator was fine and the blown 125 f1 fuse was the problem. The alt guy said it was on the machine charging at 14. 8V at idle but still the battery charge light is on. That means you must have 12. DuraLast with no know history---- theres not much Dura or Last in those batteries. If that "one Wire" is connected to the load side of the amp meter it will show correctly Charge when it is, then usually go back to t. On alternator cars, even if the indicator light burns out, the alternator can't charge -- it uses a tiny signal current through this bulb to activate the alternator. But if the battery reads over 15 volts or less than 13 volts, then there might be a problem with the voltage regulator, the wiring or the alternator. The original mechanic tried to put the alternator in but ended up taking the whole thing over to a "European" mechanic. Warning Signs of a Bad Alternator. According to Nationwide, there are a few different ways to find out if you've got a dead battery or an alternator gone bad. ) also, alternator and battery receive too high a charge resulting in computer system overheating. The battery should read about 12 volts static, start the car,,,,the battery voltage should drop then return to normal if the alternator is working correctly,,,,turn on the a/c the reading should be 14. The battery checks out fine. - Voltage output from the battery when hooked up in the trunk: 12. I was hoping that if I can figure out where it picks up ground that will indicate what is going bad. Finally, the alternator completes this cycle by charging the battery. Ive verified this by measuring the voltage at the battery terminals when on shore power. Both not saying good things Battery still not charging. I exchanged it and it still wasn't charging. I have a problem with my car. (“Voltage-Sensing was not from the alternator or the battery!) The regulator adjusted alternator output as required to maintain proper voltage level at the splice. Does the English language not exist anymore. The lights worked and seems like a dead battery. com Once you get full battery voltage at the alternator, if it's still not charging, recheck the voltage on the green wire. ) I need to find out where that blk/yellow wire goes too. You might notice that the battery cranks the engine over more slowly at times. Get the alternator fixed/replaced as soon as possible, as you won't be able to drive far on the battery alone! Usual reasons for the generator/alternor not charging the. You may be able to drive the car a short distance, if you can keep any unnecessary electrical systems turned off. 6 once car started. 3 volts on the meter. somebody pleaseeee help me i cant afford to take in to a shop. Not even headlights. and all of the same original problems. New battery also. A long story short, it turned out the "new" alternator was not charging at all so I put the old one back on Not charging perfectly, but still charging. 1 Triton this is the third new alternator I've tried. Battery was not connected during alternator install. When I start the car it only shows it in neutral regardless of what gear I am in and the fan blower does not work. The alternator is wired to the starter post & thick 12V POS cable. Just battery volts (12. I have a 2006 tdi with 110k miles. While is it technically "working", the alternator is NOT providing enough voltage to charge the battery. With the new alternator in and battery. Understanding the Leisure Battery Charging Circuit There is a lot of confusion and a lot of myths as to what actually happens when you plug your caravan into the tow vehicle and start the engine. Actually, I had purchased a battery and a new alternator because the PO had mentioned that the battery wasn't charging. Try doing it this way. Both battery and Brake lights on the dash illuminated. If the battery was low or dead, driving for 20min will not fully charge a battery. Manually charge the battery so that it is not going to overload the system. Stop engine. I do not know what to do now. Changed alternator, still not charging. 5, so the charge cycle isnt coming on. The alternator can’t effectively do its job when it’s only on for a short time and distance. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. A mechanic suggested to me the symptoms seemed to point to my alternator or battery. In such an instance, replacing it is required. 2) An engine off battery draw test. Why do you say the alternator is not charging the battery, if all the numbers are looking good. Got three new one installed and still showing bad regulator while on the car but fine off the car. When starting to troubleshoot the problem I found that the 80 Amps Alternator Fuse was broken. Charged battery reinstalled alternator and had it tested while on the car. Still after all this still not working right all the electricals go crazy brakes, locks and everything else now car has completely stopped. Replacing an alternator with a new OEM part is expensive, but there are. it onnly took me about 40 minutes to pull alternator change brushes and reinstall. PRECAUTIONS • Make sure battery cables are connected to correct terminals. The car gets me all the way home and then I send it to the local Toyota service people to have the alternator swapped out, this is done but now the battery light is on all the time. It\'s been a while since I\'ve posted because, for the most part, I can figure this stuff out. So the next day I had a new battery installed. new alternator still not charging I have done many many hours of research and testing my car and checking things but have had no luck solving this problem. (I'm not sure it is the battery but, you most likely will be able to tell soon. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. With new parts, this is probably really frustrating for you. As for the alternator that passes a bench test but clearly fails on the car, this would tend to point to a wiring problem. I have a problem with my car. was driving down the road and every warning light possible started flashing and car died. No dice, still reading battery level when running. I bought a new battery and then noticed that the my battery gauge when the jeep was in idle wouldn't go past 12V. (Possibly Sulfided Plates and probably Time for New Battery?). The current into the battery is dependent on the difference between the voltage delivered to the battery ie alternator voltage, and the internal voltage of the battery. You could confirm before and after replacing your alternator that it is in fact charging, by measuring voltage across battery posts while idling. Both should read 13-15 volts if alternator is charging. GL J_AZ _____. The lights worked and seems like a dead battery. I had a new alternator placed in my 2001 Mazda MPV about 2 months ago. I'm guessing you have an 07 Caliber and not a 97 as you put in your userCP. I checked the fuses under the hood. 5 to hopefully 12. Check the system by turning the fan on with the engine running. I hooked up the trickle charger and got it where it showed a partial (about 1/4 way) charge with battery light still on. Stop engine. Plug to the alternator connector has battery voltage to the gray/blue wire, Zero on the Black/Yellow wire, with the key off. 5amp fuse in cab fuse box, on a 2003 it is fuse #11, not sure on '02 Yellow wire needs to be tested while unplugged from alternator, same as green wire, yellow should have 12volts all the time, if not a fusible link has separated. There are several different problems that can cause your alternator to stop working. Well the car didn't have a battery when I bought it, so got a new battery. It still had enough juice left to re-start the truck easily so I could get it into a parking spot. A month or two ago I had a dead battery after a cold winter night, and replaced it not thinking much of it. I charged the battery overnight and that reads 12. Battery Charger indicator light on when vehicle starts charge on the dash indicator just over the white line on the good side. I have a problem with my car. Day two, acted like the alternator just was not charging the battery. As others have said, let the Morningstar controller handle the solar. I'll look into the voltage regulator. Same thing keeps happening. Check to make sure the wire is not broken. NRMA was called in and diagnosed as bad alternator. it should be at 14volts. I just couldn't think of an electrical/mechanical reason for the alternator to not be charging, but the glazed belt makes perfect sense in hindsight. 5 v6 w/ 135k on it. I replaced the battery with a new one that night. For background, the previous owner made me aware of the issue, said the alternator tested good and that he replaced the positive battery cable. If your "one Wire" is connected to the starter relay (solenoid) BAT terminal, the amp gauge will never show charge. New Battery and Alternator still not charging 200 1988 posted by someone claiming to be illiquent on Wed Oct 16 19:43 CST 2019 [ RELATED ] thanks for the link. Not had a problem with an alternator for many a year, three cars ago it was the ignition bulb blown, it was part of the circuit to tell the alternator to start charging. we checked the. So I began checking other things. Battery cables are made of stranded wires that have an appropriate connector to fit your battery, alternator and starter. No problem, new alternator. My battery is not being charged. Everything fine for 4 months. The repair shop will replace your alternator only to find the new alternator still doesn't charge. it's just a possibility. Bought a rebuilt alternator, charged battery. On a side note, was a little flustered that i had to do it again and was in kind of a rush doing it and forgot to unhook the battery. " If the battery is weak and the alternator is not working, the engine may not have enough electrical current to fire the spark plugs, so the engine will stop running. Not had a problem with an alternator for many a year, three cars ago it was the ignition bulb blown, it was part of the circuit to tell the alternator to start charging. How does a lead acid battery charger (or car alternator) know when to switch to trickle charge? I can understand it noticing a drop in charging current if the battery is on its own, but what if a random. Charge a Battery for Free. What's new. basicly, the battery dies after driving it a few days. When I put in on the alternator and battery all I get is 11/12. The alternator is a high quality automotive design used in the racing and marine applications. It may need replacement. Either something in the voltage regulator or something in the alternator must go to ground to generate the light. Both should read 13-15 volts if alternator is charging. Never heard of this happening. Such as battery, cables, and other components in the alternator circuit. So now I have a new alternator, regulator, and have clipped off the ends and cleaned every terminal end and plug I can find that has anything to do with the charging system. I put in new alternator, cable, and post on the new alternator and it melted. I checked the fuses under the hood. It still had enough juice left to re-start the truck easily so I could get it into a parking spot. Would have cost me over $300 for a remanufactured alternator, but i decided to take the alternator apart to inspect and clean it first. Why won't the battery charge after installing a new alternator? Answer. I have 12v to the alternator but alternator still wont charge. Disconnect the alternator lead And start the engine. Also, if the battery itself is bad, an alternator in working order won't be able to charge it. If you get good alternator voltage but say 12 volts on the battery, you have an alternator feed problem, the alternator feed cable, the fuse, or a problem at the PDC. While is it technically "working", the alternator is NOT providing enough voltage to charge the battery. so I got a new alternator from a local garage, im not sure where they ordered it from so idk if that brands any good. 8V at idle but still the battery charge light is on. Wiki User 03/06/2008. Do Not jump start the vehicle and let the new alternator try to charge the old battery! Take the battery to a service station for testing and a charge. I got a new alternator and the car still has the same problem. A few days ago the the battery light on the dashboard started flickering while driving and the battery went went flat just as I got home. First try was to charge the battery. It's not the same situation with the older generator models -- if the indicator light blows it can still charge. i tried putting in a new regulator and brushes, and it still doesnt work; when the. 1989 Ford F 150 with a 4. Check the. Tips for maintaining a healthy battery life. 70 volts at the battery, it may have a shorted cell. Not had a problem with an alternator for many a year, three cars ago it was the ignition bulb blown, it was part of the circuit to tell the alternator to start charging. whenm I did that it restored all operations and we got 10 more miles. I then replaced the alternator since the voltages were lower than the battery. So i bring it home and install it and nothing still charging 12. Printable Version. Either something in the voltage regulator or something in the alternator must go to ground to generate the light. The battery was replaced under warranty one month ago. That makes diagnosis much more difficult when something goes wrong. I checked underhood and under dash fuse boxes. 1993 Ford Ranger 2. The lights worked and seems like a dead battery. I was hoping that if I can figure out where it picks up ground that will indicate what is going bad. Why won't the battery charge after installing a new alternator? Answer. The Alternator light is not on when the car is running. So i bring it home and install it and nothing still charging 12. I bought a new battery and then noticed that the my battery gauge when the jeep was in idle wouldn't go past 12V. It could be an issue with wiring. It's not safe to simply try swapping them for another new one as faulty ones sometimes come in batches so you can't assume a new one hasn't got the same fault. I bought a new alternator and it read low voltage around 12v max. Your battery is only used when you first start the engine. we checked the. Thank you in advance. If you are reading 12 volts or lower, the alternator is not charging. It's not safe to simply try swapping them for another new one as faulty ones sometimes come in batches so you can't assume a new one hasn't got the same fault. Alternator replaced, newer battery, battery still not charging. For this price, it's a great deal. 5v, definitely not the brushes, they're in good condition, I checked the smaller wire off the back of the. you should use a battery charger if the battery was recently discharged. Had a new alternator installed. Few hours later, would not turn over at all. Installed new alternator that has 250 amp output. 4 volts then your getting power from the alternator. New alternator and new battery. At 3/4 throttle there should be 14. Charge up the battery, start the vehicle and measure the voltage. replaced alternator with a reman from rockauto. Purchased a brand new (not Remanufactured) Alternator and installed it. new battery and alternator, still won't charge and lights still on I have an 04 STI. I’m very impressed with this, it’s extremely versatile and works great! My car has been having a battery issue and not starting, I’ve had to use this about 5 times and it worked every single time! It’s been in my car almost 2 months as well and the battery level is still over 80%. voltagethen either your alternator's bad or something's screwed up in the wiring. 1989 Ford F 150 with a 4. The flat battery problem is still there and I have confirmed that the alternator is not charging. Why won't the battery charge after installing a new alternator? Answer. By the way since getting new battery, battery light still on, gauge shows 12 until I drive for a minute, light goes out, gauge moves up to 15. 5 years old. I have a 1998 lincoln town car and it is not charging when running. You may have gotten a bad one. What would cause a good alternator not charging a new battery? HELP PLEASE My car has had its alternator problems in the past but has been takin care of. The customer put a new battery and it did not fix the problem. For added insurance, you might also ask the parts store to bench test the new or reman alternator they are selling you to make sure it is charging properly. Only the rate of charge changes because of the voltage regulator. Checked all the connections, and everything is tight. i tried putting in a new regulator and brushes, and it still doesnt work; when the. It's not the same situation with the older generator models -- if the indicator light blows it can still charge. New battery also. Then I figured, turn the AC off. Usually an Alternator will put out about 13 to 15 volts. So my alternator is still not charging my battery in my 86 accord lxi. I do not know if this is the case on your '89 944S2? If the small blue wire from the alternator is not connected to the dash idiot light, the alternator will not charge on the early cars. So I began checking other things. Does starter solenoid have anything to do with this? - Answered by a verified Ford Mechanic. 5v and drops down to 10v while driving. I took all of the wires off of the corroded terminal and cleaned everything thoroughly. It's not your battery. You may have gotten a bad one. Anyways, I got a new alternator from Advance and the repair shop put in a new battery to go with it, but when testing they found that there is no charge going to the battery from the alternator? What? They just got done checking all of the ground wiring from the alternator to the starter and from the starter to the battery and it was clean. Check the system by turning the fan on with the engine running. They're not, even though some battery manufacturers would have you believe otherwise. I bought a new alternator and it read low voltage around 12v max. I checked the fuses under the hood. If you get no alternator voltage, you have an alternator or PCM field control problem. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. and since, the battery has not been takin a charge,, Swapped out the alternator and battery, first i had the wire off the alternator going striaght to the battery in the back, and the wire was veryyy long. Block to body, body to battery, battery to block. The battery was replaced under warranty one month ago. 3 volts, and can be detected by the battery going dead within several hours. How To : Crank charge batteries. Day two, acted like the alternator just was not charging the battery. Well it's still doing the same thing. I have a 2006 tdi with 110k miles. The alternator and battery will attempt to make up the difference until the voltage has been reduced to the point that the vehicle can no longer run. the battery would die while I was driving it. -Extra Heavy Duty Alternator (220A single unit) is the first possible upgrade: Required on any truck with the snowplow package. Re: why is my 1-wire alternator setup not charging? Stop disconnecting the battery with the engine running! If you disconnect the battery while running your engine you will kill your alternator in a heartbeat. It should not go under ~10. The alternator is the part of your car responsible for maintaining the battery's charge. My job is to get everyday people back on the road in their every day drivers. Today's computer-controlled charging systems tailor the charging rate not only to the electrical demands on the battery and alternator, but also to changing driving conditions. If your "one Wire" is connected to the starter relay (solenoid) BAT terminal, the amp gauge will never show charge. I also had them test the new one that I had just returned and they said it was fine. Bought a rebuilt alternator, charged battery. The alt guy said it was on the machine charging at 14. I was hoping that if I can figure out where it picks up ground that will indicate what is going bad. It can cut off at even 70MPH. I checked the fuses and noticed the 'ALT' fuse was blown so I replaced it and it is still not charging. The drive belt is not tensioned. i tried putting in a new regulator and brushes, and it still doesnt work; when the. Put battery back in and took it for testing, their test said the voltage regulator was bad, so bought a new alternator, installed it, same thing, not charging. Same deal: dead battery wouldn't hold a charge, replaced battery, it went dead too, replaced alternator with an aftermarket rebuilt unit, battery died again, added amp meter and watched a steady discharge, had the replacement alternator replaced under warranty, battery died again. I’m very impressed with this, it’s extremely versatile and works great! My car has been having a battery issue and not starting, I’ve had to use this about 5 times and it worked every single time! It’s been in my car almost 2 months as well and the battery level is still over 80%. This wa s a Duralast Battery that I purchased …I think the store on Commerce Drive in Lagrange, Georgia should Honored me with a new battery…. 7 volts across the battery. ) "DO NOT" Fill it up FULL. Frequently so called charged and ready to go new batteries are not at full charge. my 262 doesnt seem to want to charge the battery. Battery in weak or poor condition. 1 volt with the different alternator. Check the system by turning the fan on with the engine running. when the car is running the alternator should put out in excess of 12 volts (usually around 14) I would charge the battery to full capacity off of the car, then put it in and measure the voltage when you start it. I have a 1999 Four Winds Windsport RV. Re: Replaced alternator, battery still not charging Got back to it this morning. Yet for some reason your Mustang is still not charging. My job is to get everyday people back on the road in their every day drivers. So I go ahead and put the original back in and fire up the truck. 0 and 3 speed tranny and it didn't wanna charge te battery the alternator has been tested and is sending 14 volts of direct through the charging cable to the battery the. 7 volts across the battery. 5amp fuse in cab fuse box, on a 2003 it is fuse #11, not sure on '02 Yellow wire needs to be tested while unplugged from alternator, same as green wire, yellow should have 12volts all the time, if not a fusible link has separated. L, New battery , new alternator, still not charging.