| Trailer Wiring Color Code |
| Connector |
Function |
Color |
Suggested Minimum Wire
Gauge |
Where To Attach -
Vehicle Side |
Where To Attach -
Trailer Side |
| 4 Way & 5 Way |
6 Way & 7 Way |
| 7 Way |
6 Way |
5 Way |
4 Way |
Right Turn |
Green |
18 |
16 |
Right turn of vehicle's wiring harness |
Trailer's right turn signal |
| Left Turn |
Yellow |
18 |
16 |
Left turn of vehicle's wiring harness |
Trailer's left turn signal |
| Ground |
White |
16 |
12 |
Vehicle ground point - metal, uncoated, rustproof |
Vehicle ground point - metal, uncoated, rustproof |
| Tail / Marker |
Brown |
18 |
16 |
Taillight of vehicle's wiring harness |
Trailer's taillights |
|
Brake |
Blue |
18 |
12 |
Electric brake control, power for brakes |
Break away switch |
|
Battery |
Red (or Black) |
|
12 |
Fuse block or FUSED battery Lead |
Break away kit, interior lights and battery charger. |
|
Back Up |
Purple |
|
16 |
Back up of vehicle's wiring harness |
Back up lights (if available) / Hydraulic coupler. |
| This chart is a typical guide, wire
colors may vary based on manufacturers. Use a circuit
tester to verify connections. |