Electrical - 1991 mustang lx fuse block wiring diagram My blower motor turn signals and reverse does not work the fuses are good the wring from the fuseblock to everything is good just not getting power to the fuse block on those fuses looking for a wiring diagram to see where its getting power from. works sometimes if i hit the dash a couple.. Mustang Fuse & Wiring Diagrams - 1979-2017 Mustang Diagrams 1979-2017 Ford Mustang Diagrams & troubleshooting documentation. Aftermarket Part Reviews, General discussion about Muscle Cars Mustang FAQ - Wiring & Engine Info Links to pages maintained by other people: EEC IV Technical Documentation, from allfordmustangs A most read guide to the inner workings of the EEC IV PCM. MAF Theory and Facts, from allfordmustangs Here are some facts and information to help you better understand the use and function of the MAF system. 91 5.0 - Engine Wiring Harness | Mustang Forums at StangNet Its a 91 5.0 GT manual transmission (mileage unknown as it was an engine swap but I guess about 80k miles). Ill see if I can get a couple pictures posted, but its pretty simple really. the wiring from the computer runs into one end of a S/P connector and then at the other end there is a short (maybe 6-8") pigtail which plugs directly into another S/P shaker and then out to the sensors etc.. Where can you get free wiring diagrams for a 1991 Mustang Where can you get free wiring diagrams for a 1991 Mustang? They offer a free car radio stereo wiring diagram for the 1991 Toyota Corolla and most late model cars.