Mustang cylinder head, basic mods, engine mechanical information. Web the 1989 ford mustang wiring diagrams include several essential components which are necessary for its operation. Web the 1985 mustang gt wiring diagram is composed of various symbols and lines connecting them. Web 1979 wiring diagram 1.2mb 1980 wiring diagram 1.2mb 1981 wiring diagram 1.3mb 1982 wiring diagram 1.2mb 1983 wiring diagram 1.1mb 1984 wiring. Web the red wire in a car stereo wiring harness is typically the 12 volt ignition wire.