A 4-way trailer connector has basic lighting features; Running lights, left turn signals and brake lights, right turn signals and brake lights, and ground. A 7-way trailer connector has these functions and a 12-volt circuit, an electric trailer brake circuit (which requires a brake controller on board), and a reverse light or auxiliary power circuit.     Wiring diagram of 4-way trai...

What does an Anderson plug do? Anderson plugs are increasingly being used by owners of campervans and caravans to charge auxiliary batteries while they are driving and to power electrical accessories while they are camping.     They allow the vehicle battery to power the trailer or trailer's electronic stability control system and can be used as an alternative to the 12-volt power supply...