All my speakers stop working at random.intervals but usually over bumps or turning - The sound would cut off but everything seemed to be working disc spinning tuner working ETC. So I replaced the head unit - I was looking for a excuse as the stock none JBL was sort of boring anyway it worked for 2 days then the sound started cutting off again, NOW it's not possible for all the speakers to cut in/out like this with a single bad connection unless its a Amp or Crossover What do all the Speakers plug into other than the Head Unit? This is Driving me crazy and if needed I will simply Run all New Speaker Lines because this shouldn't be possible
Take off the door trim, connect external speakers (any speaker) to check if there it output from the wires or not, I did the same turns out my 4x speakers were shot for some reason... Ended up replacing the 4 speakers. It was a pain removing them as they were riveted to the door instead of screws.
