What fuse feeds the trailer tow circuit in this power distribution diagram?

Fuse position D, a 25A fuse in the engine compartment fuse box, is present 'with trailer tow only' and feeds circuit 37 (Y) to the Trailer/Marker Lamps Relay and trailer relay boxes.

What wire feeds the exterior lamps?

Circuit 14 (BR wire) runs from the engine compartment fuse box through the Trailer/Marker Lamps Relay to the Exterior Lamps, referenced on page 92-2.

Which circuit goes to the 4WABS Relay #1?

Circuit 537 (T/Y wire), fed through a 30A fuse (position B, 'with Bronco only'), goes to the 4WABS Relay #1 in the Trailer Relay Box, referenced on page 42-3.

What ground does the rear window defrost circuit use?

Circuit 57 (BK) passes through splice S102 and connector C278 to the Rear Window Defrost Control (page 56-1) and grounds at G100 (see grounds, page 10-1).

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Ford Bronco/F-Series Power Distribution Wiring Diagram - Gasoline, Page 94

Ford EVTM page 13-2: power distribution wiring diagram for trailer and exterior lamp relays

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Power distribution wiring diagram showing exterior lamp, trailer marker and backup lamp relay circuits with color-coded wires.

AI caption July 2017 · Photo 298 of 386

This is page 94 (section 13-2, Power Distribution, Gasoline) from a Ford wiring diagram manual, showing power distribution from the engine compartment fuse box for gasoline-engine trucks. The diagram traces circuits from fuse positions in the engine compartment fuse box: a 25A fuse (position D, present with trailer tow only) and two 30A fuses (positions B and M, the B fuse noted 'with Bronco only'). Circuits shown include circuit 14 (BR) feeding the Exterior Lamps (page 92-2) via the Trailer/Marker Lamps Relay (pages 92-2, 95-1); circuit 37 (Y) running through connectors C202 and C105 (C105 noted 'all except Bronco') to the Trailer Relay Boxes; circuit 537 (T/Y) to the 4WABS Relay #1 (page 42-3); circuit 57 (BK) through splice S102 to the Rear Window Defrost Control (page 56-1) and ground G100 (see grounds, page 10-1); and circuit 962 (BR/W) through splice S109 to the Trailer/Camper Adapter (page 95-1) and the Trailer Backup Lamps Relay in the Trailer Relay Box (page 95-1). A note refers the reader to the continuation of the engine compartment fuse box on page 13-3. Wire colors, circuit numbers, splices, connectors, and cross-reference page numbers are all labeled.

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Frequently asked questions

What fuse feeds the trailer tow circuit in this power distribution diagram?: Fuse position D, a 25A fuse in the engine compartment fuse box, is present 'with trailer tow only' and feeds circuit 37 (Y) to the Trailer/Marker Lamps Relay and trailer relay boxes.
What wire feeds the exterior lamps?: Circuit 14 (BR wire) runs from the engine compartment fuse box through the Trailer/Marker Lamps Relay to the Exterior Lamps, referenced on page 92-2.
Which circuit goes to the 4WABS Relay #1?: Circuit 537 (T/Y wire), fed through a 30A fuse (position B, 'with Bronco only'), goes to the 4WABS Relay #1 in the Trailer Relay Box, referenced on page 42-3.
Where does circuit 962 BR/W go?: Circuit 962 (BR/W) runs from the Trailer/Marker Lamps Relay through splice S109 to the Trailer/Camper Adapter (page 95-1) and to the Trailer Backup Lamps Relay in the Trailer Relay Box (page 95-1).
What ground does the rear window defrost circuit use?: Circuit 57 (BK) passes through splice S102 and connector C278 to the Rear Window Defrost Control (page 56-1) and grounds at G100 (see grounds, page 10-1).