How To Wire A 4 Wire Trailer Plug. Referring to a wiring diagram for a trailer comes in handy during installation. Cut the white wire short enough for attachment to the front of the trailer near the connector plug.
Tow vehicle and trailer lighting must be operational at all times, day and night. There should be a common color for both the tail lights. So it makes sense to hard-wire a common connector to a high-use trailer.
Resources: safe electric wiring Horsepower rating of plugs and receptacles Always connect ground wire.
Place the wire on the post in a clockwise direction so it's pulled tight against the terminal screw.
There should be a common color for both the tail lights. The one problem with most of these kits and prewired installations is that they leave the truck wiring and electrical components vulnerable. Referring to a wiring diagram for a trailer comes in handy during installation.