Conversion of a ’89-’93 MAF 5.0 Mustang EFI Wiring Harness PDF fileConversion of a ’89-’93 MAF 5.0 Mustang EFI Wiring Harness to Standalone Operation in Another Vehicle 1. Follow the black/light green wire to the splice in the harness and clip this wire from the splice. v. The A/C WOT relay, pressure safety switch, clutch connector, and associated wiring should now be free from the harness.File Size: 1MBPage Count: 12 Mustang Complete Wiring Harnesses | Wiring Harness Kits FOLLOW: mustang, 79 93 mustang, 94 04 mustang, 05 09 mustang, 10 14 mustang Don't let bad wiring harnesses slow your Mustang project! With the help of 5to new replacement wiring harnesses and pigtails, you can finally put those annoying wiring issues to bed. 1979-1993 Fox Body Mustang Wiring - LMR 1979-1993 Fox Body Mustang Wiring. Get your 1979-1993 Mustang wired up the right way with Late Model Restoration's Fox Body wiring harnesses! The Fox Body Mustang wiring harness can be chewed up by rats if the car has been sitting for a long time.