1979-1993 Ford Mustang 87-93 Mustang Radio Wire Diagram by admin • June 20, 2011 • 0 Comments (Last Updated On: January 7, 2018)87-93 Mustang Radio Wire Diagram 87-93 Radio Wiring Diagram This diagram is for a 1987, 1988, 1989, 1990, 1991, 1992, and 1993 Ford Mustang and show a wiring for the Radio. From the Instrument Panel to the Speakers, to the Amplifier.