What wire color is the electric trailer brake feed on 1994-1996 Ford trucks?

Circuit 43 DB (dark blue) is the electric brake feed from the trailer electronic brake control unit, running through connectors C210, C205, C424 and C417 to the trailer connector.

What relays are in the Ford trailer relay box?

The trailer relay box contains three relays: the trailer marker lamps relay, the trailer backup lamps relay, and the trailer battery charge relay.

Which wires go to the 7-pin trailer connector?

Per the connector face view: 962 BR/W markers, 963 BK/LG backup lamps, 49 O battery charge, 64 DG right turn, 52 (Y/LG) left turn, 206 W ground, and 43 DB brake.

What powers the trailer battery charge circuit?

A HOT IN START OR RUN feed (15A fuse) energizes the trailer battery charge relay, which passes a HOT AT ALL TIMES 30A feed on circuit 49 O to the trailer battery charge terminal.

What connectors are used for the trailer brake controller harness?

The dash harness connector is 14401 C210M (face view) and the control harness connector is 14A348 C210F (rear view), with pins for brake 43 (DB), ground 206 (W), BOO 511 (LG), markers 14 (BR), and fused power 50 (R).

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1994 & 1996 Ford F-Series/Bronco Trailer Camper Wiring Diagram - Tow Package

Trailer/camper wiring diagrams for 1994 and 1996 with circuit paths and connector callouts

Trailer & Camper Wiring for '94 & '96 trucks
IF THE IMAGE IS TOO SMALL, click it.

BOO (E9LY-13480-A) Motorcraft SW2237

The trailer backup circuit (963 R/Y) is already fused & relay-isolated from the truck backup lamps, so it's an obvious candidate to splice in auxiliary reverse lights on the truck.

'95 is similar to '96.
See also:
The first 2 pages of this PDF are virtually identical to a Bronco.
. . . C417 (WPT-421) . .
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TSB 89-14-17 Trailer Wiring Colors

Publication Date: JULY 14, 1989

LIGHT TRUCK: 1990 BRONCO, F-150, F-250, F-350

ISSUE: Trailer tow wire harness color codes have been revised to be compatible with SAE color code standards. When hooking up a vehicle to a trailer that has been wired according to the SAE standard, the wire color/circuits will match.

ACTION: Refer to the following Circuit Color Code Chart for the correct color/circuit usage.

CIRCUIT COLOR CODE CHART
CIRCUIT FUNCTION - OLD COLOR* - SAE COLOR*
Trailer LH Turn/Stop - LG/O - Y
Trailer RH Turn/Stop - O/LB - DG
Trailer Brake Lamp From Controller - R/LG - R/LG
Trailer Electric Brakes Solenoid - BL/BR - DB
Trailer Back Up - BK/PK - R/Y
Trailer Ground - W - W
Trailer Running/Tail - W/R - BR/W
Trailer Power (Battery Charge) - Y - O
Trailer Brake Control Feed - R - R

Color Key - Color Abbreviations
BL or BU-Blue
BK-Black
BR-Brown
DB-Dark Blue
DG-Dark Green
LB-Light Blue
LG-Light Green
O-Orange
P-Pink
R-Red
W-White
Y-Yellow

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY

Owner caption March 2026 · Photo 0 of 5000

This document is a two-page Ford factory-style wiring diagram covering Trailer/Camper Wiring for 1994 (left page) and 1996 (right page) full-size Ford trucks (F-Series and Bronco, with notes such as 'F-SERIES ONLY' and 'ALL EXCEPT BRONCO'/'BRONCO' branch points). It shows the complete factory tow package circuits: the trailer relay box containing the trailer marker lamps relay, trailer backup lamps relay, and trailer battery charge relay; power feeds (HOT AT ALL TIMES 25A and 30A fuses, HOT IN START OR RUN 15A fuse); turn and hazard flasher circuits through the multi-function switch; the brake on/off (BOO) switch stop-lamp feed; and the trailer electronic brake control unit wiring. Wire circuit numbers and colors are given throughout (e.g., 14 BR markers, 962 BR/W, 963 BK/LG backup, 49 O battery charge, 52 Y/LG left turn, 64 DG right turn, 43 DB brake, 206 W ground, 511 LG BOO, 50 R fused battery). Connector identities (C105, C202, C205, C210, C231, C279, C407, C417, C424, C112, C149), splices (S102, S109, S219, S225, S236, S240, S419), and grounds (G100, G201, G401) are labeled, along with the 7-pin trailer connector pinout and the dash harness 14401 C210M / control harness 14A348 C210F brake-controller connector pinout. Both pages warn to verify the trailer adapter is a factory option unit before use.

This document covers 1994-1996, which may differ from this 1983 Ford Bronco.

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Frequently asked questions

What wire color is the electric trailer brake feed on 1994-1996 Ford trucks?: Circuit 43 DB (dark blue) is the electric brake feed from the trailer electronic brake control unit, running through connectors C210, C205, C424 and C417 to the trailer connector.
What relays are in the Ford trailer relay box?: The trailer relay box contains three relays: the trailer marker lamps relay, the trailer backup lamps relay, and the trailer battery charge relay.
Which wires go to the 7-pin trailer connector?: Per the connector face view: 962 BR/W markers, 963 BK/LG backup lamps, 49 O battery charge, 64 DG right turn, 52 (Y/LG) left turn, 206 W ground, and 43 DB brake.
What powers the trailer battery charge circuit?: A HOT IN START OR RUN feed (15A fuse) energizes the trailer battery charge relay, which passes a HOT AT ALL TIMES 30A feed on circuit 49 O to the trailer battery charge terminal.
What connectors are used for the trailer brake controller harness?: The dash harness connector is 14401 C210M (face view) and the control harness connector is 14A348 C210F (rear view), with pins for brake 43 (DB), ground 206 (W), BOO 511 (LG), markers 14 (BR), and fused power 50 (R).