Location Key For Connectors, Grounds, and Splices

The first digit of every connector, ground, and splice references its location within the vehicle.

NUMBER LOCATION
100 Engine compartment, Powertrain (including: axle/differential/transmission)
200 Instrument Panel and Console, Steering Wheel assembly
300 From instrument panel to rear seat, below door trim panel
400 Behind rear seats, to rear bumper; Truck bed
500 Driver door
600 Passenger door, front
700 Passenger door, left rear
800 Passenger door, right rear
900 Above door trim panel and headliner