Question about 1986 Lincoln Town Car

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Charging system new alt battery gd starts runs for a short time drains battery

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  • gasitjr May 11, 2010

    Wth engine running connect a volt meter and check for at least 14.0 volts at output of alternator.If OK check for same volts at battery. If OK, disconect battery + and connect 12 volt test light in between cable end and battery post. With everything turned off (including under hood lamp) lamp should not light or be extremly dim, (you may get some draw from on board computers).

  • RAY CRAZE
    RAY CRAZE May 11, 2010

    tell me more and i might be able to help you

    thanx ray

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Check wire harness from regulator to alt.Mine was bad at regulator

Posted on Mar 15, 2009

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My Buick Rendezvous's battery keeps dying. Charged it, died again. The battery light keeps turning on then it dies. I don't know what to do, I really need this car. I dont know if its the alternator.


The Battery Light coming on usually indicates the charging system is not working. If you can limp it down to your local Auto Parts Store they will usually check your battery and charging system for free.
Yes a fuse can cause charging system to malfunction - also there will be a Major Fuse/Fusable Link. If you have your owners manual there will be a section showing fuse locations and description.
Let me know if and how this helps you
thanks

Apr 19, 2015 | 2002 Buick Rendezvous

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Car wont stay charged new alt, new battery, runs for a while but will die after few minutes running


If your Pontiac has some years/miles on it and has the original starter, it may be shorting and causing the heavy drain on the battery

Oct 14, 2013 | Pontiac Grand Prix Cars & Trucks

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2002 Ford Focus, driving down road, airbag light comes on, dashlights go out, engine runs rough then quits. Restarts, goes one block, quits again.


Symptoms of a charging system problem. The charging system comprises the alternator, battery and associated wiring. If the alternator should fail to produce a sufficient or stable enough voltage for the car's electronic systems - due to a wiring short, faulty voltage regulator, or corroded electrical connector, for example - the car will run off the "reserve" in the battery for a short time until the battery is eventually depleted. (The battery itself could also contribute to the problem if it has a faulty cell or for some reason is causing the alternator to put out an excessively high voltage in an attempt to compensate.)

So a couple of quick checks: Measure the battery voltage with the car off. Yours sounds like it will be dead; the clicking while attempting to start is the starter relay not getting enough juice. Then the question becomes: Is the battery dead because of age (fails to hold a charge) or because the alternator isn't charging it? To answer this question, measure the voltage at the battery with the car running. (Jump it or substitute a known good 12V battery.) You should see 14+V. If you only see 12V or less, you're seeing only the current battery charge without any contribution from the alt.

Finally, don't assume because the alt isn't putting out anything the alt is at fault. The wiring harness and electrical connector to the back of the alt should be thoroughly examined. (The wiring connector is a known failure point on early models.) The wiring harness should obviously show no signs of burning, melting or chafing and the battery terminals should be corrosion free and tight. If the harness checks out, remove the alt and have it bench tested. Rebuilding usually gives better long term reliability than chain store bought reman units, I'm told.

Long story short, I suspect the voltage regulator in your alternator failed, the battery gave it's all trying to keep your car running, finally gave up and now you have a dead alt and a dead battery. Don't just install a new battery without doing the alternator voltage output tests.

If you're really lucky it could be as simple as loose or corroded battery terminals.

Dec 31, 2012 | 2002 Ford Focus

1 Answer

Something is draining the battery


Someone will need to troubleshoot the charging system with a meter and a book.
There could be a short in the alternator or any number of other components that can drain the battery. That wire you ran from the alternator to the battery is supposed to be protected by a 75 or 100 amp fuse.

Sep 28, 2012 | 2001 Kia Sportage

2 Answers

Battery drained every day,battery is brand new.


When it is running,put a volt meter across battery terminals. You should see 13 + volts if alternator is working. Also put an ampere meter in series with a battery cable,key off, engine off, and you should see less than 40 to 50 Mili-Amps. If more,start pulling one fuse at a time,untill you find the circuit that is draining the battery

Mar 11, 2010 | Chevrolet Cavalier Cars & Trucks

1 Answer

Charging system


If you have changed the alternator and regulator, about all that could be left would either be a short circuit that is draining current away, or a bad ignition warning light bulb. That is because the power to energize the field of the alternator, comes through this dash bulb.

Jul 18, 2009 | 1984 Ford F 350

3 Answers

Battery is dead if it isn't started every hour.


Make sure he didn't put the wrong alternator in there. Sounds like it's charging too much, or shorting out somewhere. Take your starter in and have it checked.

Jun 29, 2009 | 1989 Pontiac Grand Prix

1 Answer

Short


Tour problem is in the voltage regulator inside the alt.
Replace the alt.

Oct 24, 2008 | 1993 Jeep Grand Cherokee

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