Hey, I am just about at the end of my rope here. Can someone please tell me why my Sony head unit works fine in my '92 240SX, but when I put my Aiwa unit in (same wires, same plugs) there's no rear sound and mute is permenantly engaged? I had it taken to a service shop and after charging me and taking a week to look at it they said there was nothing wrong with it, and that it worked fine.
WHAT'S THE PROBLEM?
Please read this thread for more information, particularly the bottom post:
There is only ONE difference in the actual wire harness plugs (that fit into the unit itself) that I can tell...the one that came with the Aiwa doesn't have a blue w/ white stripe one. That's the one that Nissan lists as being 'Factory Amp Turn On'. That's also the one that was tapped when I had my subwoofers and amp installed. So, I just left it, rather than uncrimp, strip, and recrimp all the wires, re-attach the tap, etc. Besides, the one that came with the Aiwa is unused. So the guy that had the Aiwa head unit before me (I bought it used) didn't use it either. And the service shop that checked my head unit didn't use it. So. I don't think that's the problem.
There is one main difference in the head units I should mention...The sony is slightly less powerful, it only has a 10A fuse (the Aiwa has a 15A).
PLEASE HELP! =/ Thanks so much!