I’ve recently been having battery drain issues with my 2002 Chevy Astro. After taking it to a local garage I was informed that nothing was wrong with it other than it needing a new battery. They put a new battery in and within two weeks of the van not being used the battery was dead. I did a bit of research online and learned that something may be drawing power while the van is off, and that I could do a fuse test with a multimeter. After performing this test I narrowed down the drain to being related to the following fuse:
19 Instrument Panel Radio: ATC
(Main Feed), 2000 Series (Standby)
The only things that seem to be on this circuit are the radio, cd player and some elements of the instrument panel (e.g. odomoeter). I’d like to fix this problem but I’m sort of stuck as to what I should start testing from here. Today I disconnected the radio and cd player and tried performing the multimeter test again, with the fuse back in place. It appeared that there was still excess power being used with the vehicle off.
Any advice on how I can narrow this down further?