These 3 connectors were originally in the engine bay.

The 4-pin square connector is used for the black/red wire to the reverse lights and also the red/blue START wire from the ignition switch. The other two wires are capped.

The 3-pin red connector (C-21 is used for the Grn/Wht wire to the oil pressure gauge and the Red/Wht wire to the temp. gauge. The heavier wire is not used.

The single pin connector is RUN power used for the alternator light, overdrive switch, and overdrive cancel LED.

The orange and green wires running horizontally are the 12V and ground wires for the OBD2 port.

Owner caption May 2021 · Photo 21 of 33