What wire color feeds the rear parking, side marker, and license plate lights on this diagram?

Brown (br) wires carry power from the headlight switch to all rear parking lights, side marker lights, and license plate lights; the ground-side wires are black (bk).

What ground points are used for the rear lights?

G1001 (L.H. rear parking light), G1101 (L.H. rear side marker light), G1004 (license plate light), G1102 (R.H. rear side marker light), and G1002 (R.H. rear parking light).

Which connectors are shown in this rear lighting circuit?

Connectors C1001, C1002, C1003, C1005, C1007, C1010, and C1011 are shown along the brown feed wiring to the rear lights.

Which license plate light applies only to Flareside pickups?

One license plate light branch is boxed 'Flareside Pick Up Only,' with a brown feed and black ground wire going to ground G1004.

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1979 Ford Bronco & F100-F350 Rear Parking, Marker & License Light Wiring Diagram

Wiring diagram for marker and rear lights with and without trailer-tow option

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Wiring diagram showing marker and rear light circuits with and without the trailer-tow option and headlight switch.

Part of 1978-1979 Ford Bronco Wiring Diagrams

AI caption August 2014 · Photo 16 of 48

This page (page 16) of a Ford Bronco/F-100 through F-350 wiring diagram set covers the rear exterior lighting circuit fed from the headlight switch. It shows the headlight switch internals with a hot-at-all-times feed (bk/o wire), a yellow feed to the horn and speed control (page 33), and a gray/yellow feed to the instrument lights (page 8). From the switch, a brown (br) wire splits into 'Bronco Only' and 'F100-350' routing paths, with a branch to the front marker lights on F-100/350 trucks (see page 14). The circuit then branches for 'Without Trailer Tow Option' and 'With Trailer Tow Option' configurations, passing through connectors C1001, C1002, C1003, C1005, C1007, C1010, and C1011. Loads include the L.H. and R.H. rear parking lights, L.H. and R.H. rear side marker lights, and license plate lights (one noted 'Flareside Pick Up Only'). Feed wires are brown (br) and grounds are black (bk), terminating at ground points G1001, G1002, G1004, G1101, and G1102. A reader can trace the parking/marker/license lamp power distribution, identify connector and ground IDs, and see how trailer-tow and body-style options change the wiring.

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Frequently asked questions

What wire color feeds the rear parking, side marker, and license plate lights on this diagram?: Brown (br) wires carry power from the headlight switch to all rear parking lights, side marker lights, and license plate lights; the ground-side wires are black (bk).
What ground points are used for the rear lights?: G1001 (L.H. rear parking light), G1101 (L.H. rear side marker light), G1004 (license plate light), G1102 (R.H. rear side marker light), and G1002 (R.H. rear parking light).
Which connectors are shown in this rear lighting circuit?: Connectors C1001, C1002, C1003, C1005, C1007, C1010, and C1011 are shown along the brown feed wiring to the rear lights.
Does the diagram differ for trucks with the trailer tow option?: Yes. The diagram shows separate routing branches labeled 'Without Trailer Tow Option' and 'With Trailer Tow Option' on both the main feed and the right-hand side of the circuit.
Which license plate light applies only to Flareside pickups?: One license plate light branch is boxed 'Flareside Pick Up Only,' with a brown feed and black ground wire going to ground G1004.