|
Here are few things you could check:
1) When you car stereo is being installed (sitting in the shop for prolong period of time), they might have drained your battery a few times so not all the cells are working. You can attach a battery load tester on your current battery and check the health. Check the voltage of the battery after you fully charged it, if it's around 10V, one of the 6 cells are dead and you need a new battery.
2) If your battery is healthy, you could remove the inline fuse for your sound system and see you still have the starting problem overnight. This will shut off the amplifier/eq/line driver,etc (but not necessary head unit)
3) If that still doesn't help, there might be something drawing current from your battery - you might have to double check wiring to your HU, make sure all the ACC 12V goes to a switched outlet (not direct 12V).
Good luck
|