How To Connect Trailer Wires To Car. Some trailer wiring kits include the connectors and supplies needed for installation, but some don't. Learn all about trailer wiring at HowStuffWorks.
Some trailer builders just connect this wire to the frame, then connect the ground from all the other lights and Be sure the car wires match functions of the trailer. To legally tow a trailer, vehicles must be wired for trailer lights. Connect the white wire to the silver screw on.
I'll refer to wire color and gauge to make following along easier.
To troubleshoot your trailer wiring, connect a jumper wire to the connector pins and the continuity.
If you're looking for a trailer wiring diagram, we've got that and more in this list of common tow wiring faults and how to solve them. Ground yourself somewhere, skin a little piece of the wire and do function tests. Trailer wiring is very important to towing safety.