Ford Ranger Radio Wiring Diagram - therangerstation Ford doesn't use the same color wiring in all applications but there are some common wire colors between model years as far as radios go. Below is a break down of common wire colors as well as links to wiring diagrams. 1990-1992 Ranger Radio Wiring Diagram; 1990-1992 Ranger Premium Radio Wiring Diagram; 1993 Ranger Radio Wiring Diagram 1990 ford ranger stereo wiring harness color codes to - Fixya Nov 09, 20171990 ford ranger stereo wiring harness color codes to install a new stereo. Posted by Wells on Nov 09, 2017. Need a stereo wiring diagram for a 1990 ford ranger pickup. I need wire color codes for a 2009 Ford ranger basic radio. Installing an aftermarket stereo.