Truck Trailer Light Wiring. Plugs (trailer side) and sockets (vehicle side) are available in all standard formats and can be spliced into your existing tow wiring. By law, trailer lighting must be connected into the tow.
To do so, you will need to check the connector and wiring from the vehicle to the trailer. To legally tow a trailer, vehicles must be wired for trailer lights. Plugs (trailer side) and sockets (vehicle side) are available in all standard formats and can be spliced into your existing tow wiring.
Note that either one or two lamps may be used at each of the trailer's corners.
By law, trailer lighting must be connected into the tow.
This is accomplished by tapping into the tow vehicle's electrical harness to transfer power to the trailer wiring system. Rather than inspecting the old wires that were already corroded and falling apart, I bought On my truck, not only was the trailer wiring bad, but the wiring on my truck was out too. Wiring trailer lights is not as difficult as most anticipate.