1979-93 Fox Body Mustang Wiring Harness – LMR - LMR Fox Body Mustang Wiring Harness (79-93) 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. 1979-1993 Mustang Electrical | Fox Body Wiring | CJ Pony Parts Electrical & Wiring. The Fox Body Mustang relies on its electrical system to operate at peak performance. If you haven’t addressed your Fox Body’s wiring since it rolled out of the factory, it’s time to upgrade. CJ Pony Parts is your source for Fox Body wiring harnesses and other products.