I just went out to the garage and pulled the Pioneer super tuner owners manual out of glove box. It was a conversion done in the 90’s.

The factory wire out of the radio were orange always hot,red switched hot,blue power antenna or power amp,green/red left front +, gray/red right front +,green left rear+,gray right rear +. There is only 1 black negative wire that is the ground for all speakers. And there is a separate black on the back of the radio that is the ground. My radio also has pre outs that can be used to connect a rear amp and if you use them you don’t hook up the green and gray rear speaker wires.


Mike