CAR BATTERY DIES?

1995 Buick Skylark

Tiny

09emdog

November, 25, 2011 AT 7:51 PM

I am laid off and I start my car 2-4 times a week. I recently replaced my battery and cables, and one morning I found it was dead. So I went to a part store after jumping it had both my alt and battery tested they checked out great. I only have one power outlet and thats the lighter and its empty. I make sure to turn everything off interior lights are out right away. I cant figure out why it still wants to die. The car will run off the alt its just if I park it for a day or 2 the battery will be dead. Im thinking about pulling the engine fuse and seeing if its a short. If that tests positive then pulling (ex radio fuse) instead of the engine.

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5 Answers

Tiny

Wrenchtech

November, 25, 2011 AT 8:18 PM

There is a procedure for finding a battery draw like that.

You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 10 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.

Tiny

09emdog

November, 26, 2011 AT 1:09 AM

So I would take the battery cable off (pos)like photo. And I attach the jumper wire like that as well. What does the jumper wire do? So how much is 50ma? Equivilant to a light? Or

Tiny

Wrenchtech

November, 26, 2011 AT 1:21 AM

Yes, that is the way you would hook the meter up but in a more permanent way so you don't have to hold the probes. The jumper wire is temporary and bridges the same gap. It is used to bypass the meter while all the modules go to sleep because breaking the connection of the meter with start them all over again.

Tiny

09emdog

November, 28, 2011 AT 6:18 PM

Well I tested it and I got 250 ma and I pulled the alarm fuse and it went down to 3 something.(Was the first one that I pulled that got it to go down) now I have noticed that the clock on the radio doesnt shut off. So would this be the problem?

Tiny

Wrenchtech

November, 28, 2011 AT 8:09 PM

If the clock is staying illuminated, yes that would be a problem.

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