I recently had a cool stereo installed and have been having problems with my battery ever since. I've checked the wiring and can't find why my battery is being drained overnight. I have to disconnect it if it sits for more than 7 hours or I'll have to jump it. The radio does not come on by itself, but isn't connected to the ignition. I've had both the battery and alternator checked, as well.

Any suggestions on what could be causing this? I have a 2001 Civic.

 

You have a parasitic drain. Clear here to learn how to pinpoint source of problem.

 

Probably an external amplifier is not wired properly and it is staying on all the time. Pilot lights on the amp(s) should go off when the head unit is turned off.

 

Thanks for the tips. I'll try your suggestions.

 

99% certain it would be the amp if you have one. It's probably connected directly to the battery and not through a switched source.