I am a new proud owner of a 1991 Z28 1LE. As you know most of them did not come with a radio. Also the wiring seems to be missing. Any you guys out there know where to wire the red and yellow power wires to the fuse box? I think thats all i need the other stuff is pretty much straight forward. Thanks.

 

I think I am right, the yellow wire would go to a constant power fuse, like door locks for example, so this is constant power to keep time, radio stations and settings. Now the red one, there should be a fuse that says RADIO on it, this is so it will get power once the car is turned on. I may have that backwards, but I think thats how it goes.

 

that is correct, the yellow just needs a constant and the red is an accessory that only comes on with the key on.