I'm returning my fiero to the stock radio and had some questions about wiring. The car previously had a pioneer deck installed by me sometime around 2000. Sadly the original harness was cut, thankfully I have a replacement Metra stock harness I'm in the midst of putting in. I just wanted to clarify some wiring colors after spending time searching the forum.

Fiero Speakers

RR + DK Blue
RR - LTBlue

LR + Brown
LR – Yellow

LF + Tan
LF – LT gray

RF + LTGrn
RF – DrkGRN


12V Constant ORANGE
12V Switched ?
Ground Black

Remaining unknown wires

2 Pink wires
1 yellow and black
1 gray and black

It appears as though the installer pulled a switched 12V wire right from the fuse block, but I'm not keen on this if I can avoid it.

I'm going to put a modern bluetooth stereo in , but want to start with a stock harness and make a proper adapter - Hence the desire to return it to stock. Thanks!

JM

This is a graphic I found to help me do the same thing that you are doing


It is accurate, at least everything works on my 90s Pontiac radio!