I thought the car had a bad battery due to it dying and requiring jump-starts multiple times; replaced the battery.
6 months into the life of the new battery, the car's lights came on at random after having been parked with everything off for days; they drained the battery, and it is deader than dead.
Tried jump-starting it; nothing. Let the donor car run for 15 minutes, still absolutely dead. Not even a flutter of energy.
The circuit with the donor car was definitely live, and I don't think there's any way that a basically-new battery could spontaneously become a brick. Between that and the lights coming on when they weren't activated, I'm thinking it must be some issue with the electrical system?
But what could it be? Is there any way to test the battery without a voltimeter or load meter or whatever?
It could be as simple as a broken / corroded / rusted ground point.
>>17565454
>the car's lights came on at random
VW?
>>17565454
clean the battery contacts with a wire brush
bad alternator could really mess it too
>>17565454
You don't need a fancy meter from a shop, just a quality multimeter. I'd bet money something's wrong with the wiring that has to do with giving the car power from the battery. Can you read a wiring diagram and/Or bump start it?
>>17565491
Also do this.
You live in a road salt state, OP?
>>17566020
Yes, actually!
Also, thanks to the above posters for their advice, gonna try cleaning the terminals in the morning and go from there.
>>17565454
It must of taken them a decade to generate that picture.