I've been away for a few weeks. Come back to totally dead battery.

Attach battery jump pack, and horns and hazard lights sound/flash. No start on turn of key.

I'm about to charge the battery back up, see what's going on there. It's a fairly new AGM.

Is there any protocol to follow in this situation? I've never had it sit for long before with zero volts.

 

Great. Took battery off, seems I've been playing host to some critters.





I hope this is not connected to the battery drain.

I'm more inclined to think it's something to do with the recent stereo/amp/sub install.