What does the reverse wire connect to?
The reverse trigger wire is providing a signal to your head unit to indicate that the vehicle has been shifted into reverse. In the previous section, we made this connection to the back of the vehicle’s head unit. We must now connect the wire to the proper signal on the vehicle’s wiring harness.
What color is the reverse trigger wire?
The red wire passes the reverse signal up to the front of the car. The camera end has a red and black wire which the red wire gets connected to the reverse light and the black gets connected to ground.