Question about 2002 Buick LeSabre

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Battery issues - electrical short

We have a 2002 Buick LeSabre that shows no diagnostic problem but something is draining the battery.

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You may have a trunk/boot or glove compartment light that is permanently on due to a faulty switch. Get someone to jump in there and see if the light goes out.

Posted on Jan 14, 2009


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Need wiring schematics to troubleshoot some electrical shorts

Way to many diagrams to guess to send. What components are working. Check engine light on?

Nov 01, 2015 | 1992 Buick LeSabre

3 Answers

Battery drajn

I can't come and diagnose your car, but there are 2 things that might help.
First, if you will disconnect your battery each time you are finished driving your car, the battery will not drain overnight. You will need to re-connect it to go somewhere.
Second, there is an electrical item that is turned on, that is not turning off, or, there is a short in your electrical system.
When, in the morning or whatever, you hook up your battery, if there is a spark of any size at all between the battery cable and the battery connection, you know there is a short or something left on.

Jan 17, 2013 | 2001 Buick LeSabre

1 Answer

Battery drain

Someone will need to check the circuits in the car for a voltage drain.
A mechanic would pull the negative battery cable and use a test light to check for a power draw on each circuit. Could be a relay or other electrical component with a short to ground. Could also be a small courtesy light left on.

Jan 17, 2013 | 2001 Buick LeSabre

1 Answer

02 leSabre loses electrical power no windows horn radio or starter but the lights come on

Thanks for choosing FixYa and welcome. I would start by checking the alternator and battery out. Even though the lights are on, the battery can be too weak to crank the starter. Check your ignition fuse also. Sounds like a power issue so check all your battery wires and terminals/post out. May have a bad connection. Make sure it is not loose also. I would say check the alternator first cause it can kill the battery as well.

Sep 29, 2011 | 2002 Buick LeSabre

1 Answer

I charged the battery on my 2002 buick and it started but the next morning it would not.

I would suggest you take it to an autoparts store and have them test both the battery and the alternator to find out which is giving you problems. If both are good then you have a short somewhere in your electrical system that drains your battery overnight. Which would take a clamp on ampmeter to localize.

Aug 08, 2011 | 2002 Buick LeSabre

1 Answer

2003 Buick LaSabre fuel pump runs when jumped wired..Will not run other wise. What fuses or relays do I check and where are they?

I have a 2002 Lesabre and would suspect it is the same. The 2002 has two fuse blocks. One under the hood by the jump start peg and the other is under the back seat by the battery. My manual shows the #1 fuse in the block under the seat as the fuel pump fuse. I would look there first. If blown, be prepared for another as something caused it to go out. Perhaps a short in a wire.

Mar 21, 2010 | 2003 Buick LeSabre

1 Answer

Something electrical is draining battery on 1987 XJ6;

Have you checked the alternator? The alternator may not be charging the battery. With engine running, check the voltage at the battery (it should be ~14V). If it's less than that, your battery won't charge properly. You can take your alternator to auto store to have it load tested also to be sure. Sometime alternator issues don't show up until it gets hot. Defective alternators have also been known to drain the battery after the car has stopped.

May 10, 2009 | 1987 Jaguar XJ6

1 Answer

92 buick lesabre new battery, alt tested fine runs, then won't with lights

It sounds like there is a short or something...something is drawing power constintly and draining the battery. Something like this is usually hard to diagnose and requires a lot of electrical testing to determin where the power draw would be coming from in order to fix the problem. I would say u may need to have somone test your electrical connections and whatnot to find the source of the problem. Hope this helps any, good luck!

Nov 08, 2008 | 1992 Buick LeSabre

1 Answer

95 LeSabre custom dies and comes back on

Electrical problems of an intermittent nature are the most difficult to solve. It sounds as if something is draining the battery. The charging system needs to be checked with diagnostic equipment. Something like a parasitic drain may be causing the battery to run down and the alternator cannot keep up with the demand. When something like power windows are activated, they draw a higher amount of current to get started than they need to keep rolling, and this surge of energy may be robbing the injectors of the current they need to allow fuel delivery. I experienced a problem like this on a customers car, and we found that the trunk light was staying on when the lid was down. This was enough to keep the battery from becoming fully charged, and the alternator had to be replaced from being over-worked.

Sep 26, 2008 | 1995 Buick LeSabre

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