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.

Home/ Registry/ Ford/ Bronco/ 1987-1991/ 1988 Ford Bronco/ Photo supermotors.net/registry/media/824080

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

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

‹ ›

Reference · 1987-1991 BroncoAll 175 wiring diagrams

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

Ford 3G Alternator Wiring Diagram - Mega Fuse, Charge Lamp & Wire Colors

1973-1974 Ford Point-Type Ignition System Circuit Diagram - Coil & Distributor

Ford 4-Terminal Starter Relay Wiring Diagram - S & I Terminals, Coil & Starter

Ford 4-Terminal Starter Solenoid Wiring Diagram - S & I Terminal Functions

KC Driving Lights & LED Light Bar Relay Wiring Diagram - Ford Bronco Aux Lights

Connector faces page 150-22 with C128 VIP self-test connector pinouts and warning chime module

1986-95 Ford V8 Truck Speed Density EEC-IV Pinout Wiring Diagram

1990 Ford Bronco Speed Control Wiring Diagram 31-2 - Cruise Servo & Amplifier

1990 Ford Bronco Speed Control Wiring Diagram 31-1 - Cruise Control Circuit

Ford EEC-IV Self-Test Connector Diagram - STO, STI, SIGRTN & Fuel Pump Pins

1995 Ford Bronco 5.0L Engine Controls Wiring Diagram - MAP, HO2S, PCM (24-6)

175wiring diagrams1987-1991 Ford Bronco More reference

1992 Ford 5.0L/5.8L Engine Component Connector Locations Diagram

Schematic

Rear Antilock Brakes Flashout Code 5 test steps 5a through 5c with module harness connector pin view

Service procedure

Ford certification label dated 06/88 with GVWR 6300 LB, GAWR ratings and 31-10.5RX15C tire data

Spec plate

Ford 5.0L EFI Engine Exploded Diagram - Internal & External Parts List

Exploded parts

1988 Ford 5.0L emissions decal with EEC IV/EFI timing steps and vacuum hose routing diagram

Vacuum routing

1988 Ford Bronco/F-Series Fuse Box Diagram - Fuse Panel Sticker E8TB-14K016-AA

Fuse chart

Ford 5.0L/5.8L Air Throttle Body Assembly Diagram - Canister Purge Ports & TPS

Manual page

Brochure

Blueprint

Ford V8 Intake Manifold Bolt Tightening Sequence Diagram - Stud Locations

Torque spec

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

Part of 1987-1991 Ford Bronco Wiring Diagrams

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.

Is this accurate? Sign in to help verify it.

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.