Wire Installation Tips
By law, trailer lighting must be connected into the tow vehicle’s wiring system to provide trailer running lights, turn signals and brake lights. This is accomplished by tapping into the tow vehicle’s harness power to the trailer wiring system. Connectors are used between the two to allow disengagement when not towing.
Various styles of connectors are available with four to seven pins to allow transfer of power for the lighting as well as auxiliary functions such as electric trailer brake control, backup lights, etc. Choose a connector that has the required number of pins for the functions required. The male end (plug) is mounted on the trailer side and the female end (socket) on the vehicle side.
6 Way Connectors
Round 1 1/4″ diameter metal conductors are available that
allow 1 or 2 additional functions such as back up lights and electric brakes.
7 Way Connectors
Additional pins for auxiliary power, trailer battery charging, etc. are
available using larger 2″ diameter, round connectors.
7 Way Trailer Plug, Flat Pins

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