I just bought this 03 Reg cab, and the rear speakers weren't working, so I pulled them out and they were both plugged in, So I figured the outputs were blown on the head unit, So I replaced the Factory deck with my Premier head, and still no rear speakers, the fronts work perfectly, Where could the problem be???? The only other thing i could think of, was that there may be a factory amp thats screwed up, is this possible???? Any help would be great..

 

Only thing i can think of is the wire might be cut but I wouldnt think that both would be mysteriously messed up. Hmmm......maybe something in the harness? Try to look up around there to see if something looks odd or tampered with.

 

I looked at as much of the harness I could see, but nothing, If I can't find the problem today, i am just going to replace the rear speakers, and run new wire from the deck back, this will surely fix it

 

Honestly in a reg cab you don't even need the rear speakers. A lot of people don't run rear fill, maybe the previous owner clipped the wires to the back speakers.