Trailer Adapter Wiring for '93 Bronco
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Condensed & corrected

BOO (E9LY-13480-A) Motorcraft SW2237
Turn Flasher (electronic for LEDs CEC EF32RLNP)
Hazard Flasher (electronic Novita EL12)



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.



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 February 2012 · Photo 4232 of 5000