Which pin is for trailer brakes?
center pin
trailers use the center pin for electric brakes. Besides the three main lighting functions, additional pins for auxiliary power, trailer battery charging etc.
Are all trailer connectors the same?
There are two different types of 7-way connectors, one with flat pins (blades) and one with round pins. The round pin connectors are very uncommon, while flat pins are common and often found on newer SUVs and trucks that come from the factory rigged with a trailer hitch.
What is TM on trailer plug?
TM – Tail Light (Brown) S-Brake (Black) BL-Backup Light (Blue) GD – Ground (White) LT – Left Turn (Yellow)
What does EB stand for on trailer plug?
EB would stand for electric brake on a trailer connector. This is the circuit that carries voltage to the brake assemblies of the trailer. XL would be auxiliary and is typically a 12 volt power circuit used for lights or maintenance charge on a trailer battery.
What color wire is TM?
BROWN
NOTE: Identify contacts by looking into the open end of plug or socket.
| Plug | Color | Description |
|---|---|---|
| LT | YELLOW | Left Turn Signal |
| RT | GREEN | Right Turn Signal |
| TM | BROWN | Tail Lights |
| CENTER | RED | Charge Line |
What do trailer wire colors mean?
Trailer Wiring Has 5-Wires White, Yellow, Green, Yellow/Brown, and Green/Brown On a 4-Way flat trailer wiring harness, white is the ground, brown is running lights, yellow is left turn signal and green is right turn signal.
What does TM mean on a trailer light tester?
GD = Ground, white wire TM = Tail, brown wire LT = Left Turn, yellow wire RT = Right Turn, green wire AX = Battery, black wire EB = Electric Brakes, blue wire NOTE: Locate wires and pin location by function only.
What does ax mean on trailer lights?
What does BU stand for in trailer wiring?
BU = reverse lights (if this circuit is not connected on the vehicle it will not light up) RT = Right Turn. TM = running lights (tail/marker lights) LT = left turn.