The triangular large connector that connects to the 3 center posts on the back of the switch has 4 wires. Red, which is the hot from where the battery connects to the back of the starter. Purple which I think is the solenoid. And the third connector goes to IGN has 2 wires in it. A pink small wire that goes straight to to fuel gauge and a larger brown wire that is the source of the residual voltage (~10v). I don't have a wiring diagram. Does any one know where this brown wire goes. If not I will have to start until wrapping wires.


1959 Chevy 8500 - Spartan 80
366 BBC