My mom's got an 02 impala, 3.8l, and for some reason, there's like 400 mA draw when the key's off. It doesn't do it 100% of the time, so I assumed the relay for the radio was staying on (googled and found others having a similar issue). I forgot the name of the relay, but I took it out and left it out and the problem went away. So, I left it out and wired up the radio with another relay to only power on when the key is on to keep testing and allow the radio to function. Granted, it looses time & presets, but it's temporary.

Well, the problem came back. I pulled the fuzes from under the hood and narrowed the drain to the driver's side fuze panel. Once there, I narrowed it to the relay for the BCM. If I pull that relay, the draw drops to the typical 12-15 mA. I googled it and found others having similar issues with the BCM staying on, radio's locking up and staying on with the key in the off position, etc.

I waited 10 minutes, 30 minutes, and well after 30 minutes to test, and it always shows between 400-500 mA draw.

Have any of you came across this issue, or something similar? It's got me stumped.

i would say PM mike, he's a GM technician
in search of a new 2g....

I have seen this lots of times, and lots of different problems. However, the most common that I have found is that the relay for the DRL goes bad, but they still work, and the BCM faults and consistantly draws. Have you checked for any codes in the BCM yet?

Originally posted by eclipse982nrRST
Have you checked for any codes in the BCM yet?

It's not throwing any, but I'll check and see if there are any stored in it.

Originally posted by cougar694u

Originally posted by eclipse982nrRST Have you checked for any codes in the BCM yet?

It's not throwing any, but I'll check and see if there are any stored in it.

There is no BCM light, like a PCM sets a Check Engine light...

The battery run down relay runs all the time. I haven't pulled the codes yet. If I pull the BCM fuze, the battery run down relay clicks off, then back on when I plug the fuze back in.

I'll check the DRL relay and see how it does.

Thanks!

That didn't work. Left the relay out and the first day it started fine, but this morning cranked like it had a dead battery.

Next idea? My dad's asleep (works 3rd shift). He'll hook his Snap-On scanner to it later and see if there are any BCM codes.