Which wires do you hook up to the back up netural switch on your c4 transmission?

To connect the backup neutral switch on a C4 transmission, you typically hook up the two wires that are part of the neutral safety switch circuit. These are usually a light green wire and a black wire, which complete the circuit when the transmission is in the park or neutral position, allowing the vehicle to start. Always refer to a specific wiring diagram for your vehicle to ensure correct connections.