Hi everyone.
I'm in the process of installing one of those Custom Autosound 740 stereos to replace the old cassette stereo. I figured it would be pretty simple unplug harness, plug in new connections, done... and of course its not.
The wiring behind the radio is hilarious, with multiple pigtails and dead ends and wires jumping multiple terminals in the harnesses. It took me a full day to just figure out what was going on. An entire set of wires leading away from one of terminals turned out to all be cut and dangling loose behind the glove box. Lord knows what was done here.
In any event, after untangling the mess and removing the dead ends, it seems that I have 7 useful wires leaving the area, and only 3 reappear in the trunk, where one of them is split, so I'm guessing I have stereo up front and the rear speakers are wired in series/mono. My question is does anyone have a sense of where the speaker wires travel and how hard it might be run a fourth wire to get true stereo in the back?
Thanks for any thoughts. another simple project becoming a rabbit hole, alas.