Did you know that if you don't start a 2012 Chevrolet Caprice PPV (6.0 L V-8) for three weeks, the sleeping electronics will drain the battery dead?
I know that now.
Luckily, I have an excellent battery charger.
All better now.
The car draws between 0.3 and 0.5 amps when it's sitting there waiting for you to come back.
It's the keyless entry system waiting for your signal, I am told.
And keeping a couple volatile memories alive for the clock and mileage calculator.
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That is a lot of current for computer memory. I'd bet that you've got something draining the battery slowly with that much current.
ReplyDeleteGlove box light switch, mirror lights on the visor maybe, possibly a door switch. Any small switch could be telling one of the modules that the car isn't ready to go to sleep. I think 100 milliamp draw would be the absolute maximum and I think 50 milliamps would be normal for a car with a lot of electronics. 300 to 500 milliamps is a control module remaining active. Maybe more than one. Good luck. You may need a high end scan tool to find the cause.
It's primarily the BCM sitting there waiting, not the memory.
DeleteIt seemed like a huge draw to me as well, but it's been confirmed by fellow forum denizens for the car.
It's NORMAL. I just need to drive it to keep it from being a problem.
The electrical system on these things is so messed up compared to the Aussie car.