Ok, so I noticed that my ML system wasn't bumping at all for about 5 months. I just thought that ML just sucked until last night, I hit a bump on the road and all of a sudden my subs started to work and the system sounded good. Then I woke up this morning to turn on the car and again, my subs weren't working. Maybe there's a wire that's loose?

Can anyone tell me where and how to check if there is a wire loose.

 

search, start with sub then go to amp.

 

Ok I searched everywhere, but I cant seem to find a thread with a pic of which wire to check. =(