Battery losing charge [Archive] - Forum


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04-05-2011, 08:41 PM
2000 pontiac GA.

During the winter a year old battery went dead so I bought a new one. Lasted a month before giving even more problems.

Battery and alternator is good. 12.2 volts off. 14.2v running.

Hooked negative cable in series a amp meter. Draining at a rate of 120mA. Started pulling fuses from relay center under hood and this is what I came up with.

Pulling the L/H BEC BATT the amps being drawn go down 40-50mA.
Pulling the R/H BEC BATT the amps being drawn go down 40-50mA.
Pulling the IGN SW- BATT 1 it goes down 30mA.

When all three are out it is only draining at a rate of 5uA.

car will run with battery unhooked but drains within hours.

Any suggestions on where to go next?

04-06-2011, 01:33 AM
I had the same problem with my GAGT ended up being my cap on my stereo system and bed cell in my batt. Removed cap and replaced batt with new one and hasn't had a problem since. Do you have an aftermarket system installed? Buddy of mine had same problem ended up being his amp the remote wire wasn't turning the amp off

04-06-2011, 08:46 AM
I did have a amp and subs couple years ago but have since been taken out.

It does have a alarm and remote start.

Does anyone know anything about the BEC BATT circuits?

04-06-2011, 09:35 AM
This is on my 2003 GAGT

I don't know how deep you want to go with this, but the R/H BEC BATT fuse provides power to the R/H fuse box on the instrument panel (IP).
Same with the L/H BEC BATT fuse provides power to the L/H IP Fuse Block.
Now you need to go to the individual circuits inside the car, pull the fuses one at a time and see which one is causing the drains and go from there.

04-11-2011, 09:00 AM
The problem lied in a old alarm system/remote start. Pulled fuses and it stays charged.

Looking at the "professional" install I feel I could of done better myself.

Thanks GAGT