General trailer electrical diagram
Components:
* Trailer socket on car
* Trailer fork
* Electrical harness
* Tail lights
* Side lights
* Direction indicators
* Control panel
* Fuses
Scheme:
1. Vehicle Power: Power from the vehicle’s electrical system is supplied through the trailer socket on the vehicle.
2. Electrical Harness: Power is transmitted through the electrical harness to the trailer plug.
3. Plug: The trailer plug connects to the trailer socket on the vehicle.
4. Tail Lights: The tail lights, consisting of brake lights, turn signals and parking lights, are connected to the electrical harness.
5. Control Panel: The control panel can display trailer electrical system status information such as light status and battery status.
6. Fuses: Fuses are installed in the electrical harness to protect the system from overloads.
Pinout of plug and socket
7-pin plug and socket
*Pin 1: Left turn signal
*Pin 2: Trailer brake control unit
*Pin 3: Ground (common)
*Pin 4: Right turn signal
*Pin 5: Side lights
*Pin 6: Brake lights
* Pin 7: Reverse
13-pin plug and socket
*Pin 1: Ground
*Pin 2: Rear fog lights
*Pin 3: Trailer brakes
*Pin 4: Left turn signal
*Pin 5: Right turn signal
*Pin 6: Side lights
*Pin 7: Brake lights
*Pin 8: Trailer brake overload signal
*Pin 9: Auxiliary Battery Power
*Pin 10: Trailer refrigerator power supply
*Pin 11: Trailer Battery Charger Power Supply
*Pin 12: Trailer air conditioning power supply
* Pin 13: Reverse