Quote:
Originally Posted by vando002
Hi All,
I just had my BCM replaced on my 2002 Impala LS, 287k. I was out of town over the 4th of July weekend and I had this replaced and programmed just before I left. After being back I noticed that the battery is drained completely dead overnight. It's so dead that the power locks on the remote won't even work. Has anyone had this issue before or have any idea what could be causing the drainage on the battery? The BCM is a reman from Rockautoparts.com and I just sent the original back for the core charge so I can't plug the old one back in to see if it does the same thing. Any ideas???
Thanks!
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first re-charge the battery with a charger not the alternator. then see if you left some things on....
aftermarket radio/amp/alarm are usually the cause....
then it could be the interior lights stayed on....
if all this comes up with no cause you will need to place an ampmeter in series with the battery to see what the OFF battery drain is..
the amperage should be around 50-200ma's...if it is above this amount pull fuses to locate circuit sucking the battery dry..