What fuse links power the trailer option circuits?

Fuse Link F (16 GA black) powers circuit 284 R to the trailer electric brake control, and Fuse Link G (16 GA black) powers circuit 37 Y for trailer power. Fuse Link P (18 GA brown) feeds circuit 526 BK/W to the trailer lamps relay. All fuse links are shown on pages 15 and 20.

What wire feeds the trailer electric brakes?

Circuit 22 BL/BK (blue/black) runs from the trailer electric brake control through connectors C1101, C1102, and C1110 to the trailer electric brakes.

What circuit provides trailer power?

Circuit 37 Y (yellow) runs from Fuse Link G through connectors C420, splice S522, C1102, and C1110 to trailer power.

How are the trailer lamps grounded?

The trailer lamps ground through circuit 206 W (white), passing through connector C1102 (marked N.C.) to ground G1006, with the trailer ground coming through connector C1105.

Which circuit is used for the trailer backup lamps?

Circuit 140 BK/PK (black/pink) comes from the backup lamps (page 61) and passes through connector C1105 to the trailer backup lamps.

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Ford Bronco Trailer Option Wiring Diagram - Trailer Package Circuits (Page 108)

Trailer option wiring diagram page showing color-coded trailer lamp and brake circuits

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Service manual trailer-option wiring diagram routing color-coded circuits to trailer brake, electric brake, lamps and backup lamps.

AI caption September 2010 · Photo 108 of 120

This is page 108, titled "TRAILER OPTION," from a Ford factory electrical/vacuum troubleshooting manual (EVTM-style wiring diagram book). It shows the trailer towing package wiring schematic. Two circuits are fed "HOT AT ALL TIMES": Fuse Link F (16 GA black) feeds circuit 284 R through connectors C420 and C1101 to the trailer electric brake control, which then outputs circuit 810 R/LG to the trailer brake lamps and circuit 22 BL/BK through C1101, C1102, and C1110 to the trailer electric brakes. Fuse Link G (16 GA black) feeds circuit 37 Y through C420, splice S522 (which also feeds Fuse Link P, 18 GA brown, circuit 526 BK/W to the Trailer Lamps Relay, page 52), then through C1102 and C1110 to trailer power. Trailer lamp grounding is via circuit 206 W to ground G1006 through C1102 (N.C.) and C1105. The trailer backup lamp circuit 140 BK/PK comes from the backup lamps (page 61) through C1105. Readers can learn wire circuit numbers, colors, gauge sizes of fuse links, connector identifiers, and cross-reference pages for related circuits.

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Frequently asked questions

What fuse links power the trailer option circuits?: Fuse Link F (16 GA black) powers circuit 284 R to the trailer electric brake control, and Fuse Link G (16 GA black) powers circuit 37 Y for trailer power. Fuse Link P (18 GA brown) feeds circuit 526 BK/W to the trailer lamps relay. All fuse links are shown on pages 15 and 20.
What wire feeds the trailer electric brakes?: Circuit 22 BL/BK (blue/black) runs from the trailer electric brake control through connectors C1101, C1102, and C1110 to the trailer electric brakes.
What circuit provides trailer power?: Circuit 37 Y (yellow) runs from Fuse Link G through connectors C420, splice S522, C1102, and C1110 to trailer power.
How are the trailer lamps grounded?: The trailer lamps ground through circuit 206 W (white), passing through connector C1102 (marked N.C.) to ground G1006, with the trailer ground coming through connector C1105.
Which circuit is used for the trailer backup lamps?: Circuit 140 BK/PK (black/pink) comes from the backup lamps (page 61) and passes through connector C1105 to the trailer backup lamps.