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do you need a sound interface to have an aftermarket stereo in a '86 nissan 300zx GLL Model? Stereo works, but there is no sound. this car has a factory amp with cables coming from it to the stereo instead of speaker wires.

Color Codes: B = black G = green L = blue LG = light green R = red W = white Y = yellow For below: Abbrieviation = Color of wire = Long name The color after the slash (/) is the stripe color. i.e. R/G = red wire with green stripe. SF, GL, and SS models should all be the same. All models: ILL = R/G =...

I have a 86 300zx. Putting in a sony explode cd player. Have installed this stereo in about three of my previous cars with no trouble. but this one has me puzzled. I ordered the wiring harness for this car. Matched up all the wires, capped off the ones i did not use. There were 2 common grounds comi...