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91Accord good alt nd batt. Runs batt dead . In idle charges enough start and cpl miles dies . Why alt not charging while driving?

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  • Cars & Trucks Master
  • 511 Answers

Hi your Altenator needs rebuild or replaced its braking down under load.

Posted on Apr 09, 2015

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Posted on Jan 02, 2017

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SOURCE: alternator not charging

Check for voltage with a multi meter or volt guage most of the GM trigger wires come from the computer and are only 5 volts. 5 volts is not enough to light some test lights. If still nothing the problem is probably the computer. But it can be manually excited. The two terminals in the alternator on the left of the pigtail (when looking from the front of the van) need + power. the far left is the trigger wire the one next to it is ignition power.

Posted on Dec 15, 2008

stormbrewin
  • 426 Answers

SOURCE: charging problem 1991 volvo 240

14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.

Posted on Dec 29, 2008

  • 416 Answers

SOURCE: my 1996 nissan altima wont

Cables from alt to battery can be deposited/burned/oxidized. In this case battery wont get charged. Also check the alternator connections. Cable might be burned or not tight enough
Also serpentine belt might be not tight enough
Good Luck

Posted on Jan 17, 2009

  • 534 Answers

SOURCE: New alternator didn't charge battery. (2VDC

As the car re-started, the battery is not flat.
The voltages measured indicate a problem with either the power or ground connection in the circuit between the alternator and the battery.

You likely have a intermittent / poor ground connection somewhere in the power system.
Check battery terminals are clean and firmly attached.
Check battery cable and alternator ground connections are intact and in good order.

Posted on Oct 30, 2009

  • 436 Answers

SOURCE: Daughter called me ..car wont

it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.

good luck

Posted on Oct 21, 2011

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Battery won't hold a charge, battery and alternator both check good. Where is the voltage regulator at on these vans?


Hey Rick ,I don't know what you have so it makes it harder to help you ,I don't dough you checked battery and alt . unless you have a dead short the battery should hold a charge , as far as the alt. most have an internal built in regulator , start the vehicle when its running disconnect the battery if it dies its the alt .

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I just replaced battery and alternater but the battery died hile driving and once i jump the car it ill run for thirty seconds then die.


you've had the misfortune of getting a bad rebuilt alternator-sorry-they should give you another one -I hope its not hard to replace-Denny

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My stabilitrak light started going on. I replaced the battery. Today while driving my battery went from 14.6 volts down to 12.5 and then back up. What is going on?


stabilitrac is from balljoints prob on tire rods of sway bar and altonator runs at 14v and batt runs 12. for it to be dropping to 12 you need to run to auto zone n they can check your alt. or while its runnind take your batt post off batt n if it keeps running your alt is good and if it dies out rite away alt has to be changed

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1997 Dodge Ram 1500 5.9l 4x4 club cab. Gen light comes on. I tap my alt and it charges normal 14v after 10 min drive it stops charging and drops to 10v. had alt tested at autozone and cheakers both te


replace your altenator . the brushings are most likely bad and only making contact after you strick the alt. housing. it makes the brushing drop down to the armature.

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Daughter called me ..car wont start. checked battery at Autozone...it is good. someone stopped to help them and bang on startere and it starts up. Bad starter. Starter replaced. Next day daughter...


it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.

good luck

Sep 02, 2011 | 2000 Oldsmobile Intrigue

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I have a 2000 chry town and country the batt light came on the other day ignored it. now tonight when driving it the whole car shut down got a jump then it died again down the road. i jumped car agian...


wow if your battery is that old i would get a different one but you can have the battery and alternator tested for free at a auto parts store they can tell you if its junk or not but thats why your having them problems when your alternater spins it charges the battery if the battery is no good it wont hold a charge and you car will die now it the alternater is bad it will not keep the battery charged and your car will die.

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My honda civic 1996 model has a new battery while i was driving i felt the light is dimmer than before the radio begin to on and off the oil gauge and the speedometer drops to zero then when i stop the...


It sounds like you have a charging problem-alternator is not recharging batt when drive, batt will only go so far before it runs out then you get your symtoms. you would need a volt meter to double check this. Fully charged batt will be about 12.7volts once car is started and running you should see about 13.8 to 14.2 volts at batt terminals if alt. is chariging batt. the other item that can cause this is the volatge regulator that controls alt. which are sometimes built-in alternator and sometimes they are external to alternator. and of course make sure your belt is turning alternator to allow it to work. One other small note if you do the engine running test-somtimes- if your car idles low(600 or 700 rpm) you need to give a little throttle (1000-1200rpm) to make sure alternator is turning fast enough for output test.

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My mother has a 2006 LS 430 Lexus with only 5500 miles. The battery dying is a constant issue. She goes to start the car and it is dead. She has replaced the battery three times. No electrics are left on....


It sounds like the Alternator is bad or isn't charging teh battery completely. Or if this is the same station that has been selling her batteries they have a bad batch of weak batteries. Have the battery tested for dead cells. If there are none then put it on a charge and fully charge it and test the alternator. Auto zone can test both and will do so for free but you will have to remove the alternator for testing.

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your charging system is not working,so your car is working only on batt. power,when batt.gets weak car will cut off! good chance alter nator is defective! check alt.elect. connections at alt,if con.are good its alt.

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1993 Buick Roadmaster with 66,000.00 original miles. Something going on with maybe the charging system. When driving the car want's to cut out but giving it gas keeps it going. The RPM goes up and down...


sounds like the crankshaft position sensor may be failing, this is not a charging system problem, if it where it would run fine until the battery was run dead and then u would have nothing, no crank no lights nothing, I had this same problem in my 91 Buick Rivera, it has the same engine and electronics. did almost exactly what yours is doing, crankshaft sensor fixed it, and $200 of course.

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