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It sounds like you might have some speaker wires shorting together causing sound drivers in cd players to disable......Because plain and simple if you install a cd player and connect a speaker directly to it, then it shoudl work.....So at this point connect yellw, red, and black wire so it powers up.....Then with all the speaker wires disconnected connect just one speaker......If it works reconnect them one at a time until it stops so you know which circuit has problems. Here is a wire diagram.
Here are connector views. The dimmer system is controlled by body control module...Try to disconnect battery and touch cables together for 10 seconds to see if that helps.
I've got two tan wires, two gray wires, and an orange wire (I've determined that the orange is, in fact, power) that are unaccounted for in the harness connector. Any thoughts?
I would start by disconnecting battery and restting body control module to see if that helps. Here is a wire diagram, you can see how dimmer related lights are powered directly by body control module. About all you can do is test dimmer switch, wiring, and if all good replace body control module. Let me know if you have questions, thanks.
Here is a picture.
This didnt have a optional amplifier......Look on passenger side of trunk behind liner....which would be where the digital radio receiever would be if you dont have base radio.