The fog light switch plugs into this 3 wire connector (2male, 1female). This diagram then showes a black/yellow wire from the circuit breaker going to "starter relay battery terminal." This is the wire I tapped into the black/orange wire on the headlight switch. Hope this helps, you might call or visit you mustang supplier and pick up a wiring.. Customer: 1986 Ford Mustang SVO. I'm trying to figure out the fog lights, BUT, every wiring diagram I've found only show a two wire switch, while this car has a three wire switch. Hoping someone can provide a wiring diagram or at least vehicle specific guidance to help sort this one out. thanks.
1979-2017 Ford Mustang Diagrams & troubleshooting documentation. Aftermarket Part Reviews, General discussion about Muscle Cars. 5.0 Mustang Forums (1979 - 1995) 5.0L Tech. Status Not open for further replies. 1986 mustang gt fog lights. Tags fog lights wiring diagram. Jump to Latest.