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Trailer Harness Wiring Colors TSB 89-14-17 for 90 Bronco & F Series
Source: by Ford
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-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