What functions do a 4 way trailer wiring harness have?
4-Way Trailer Wiring As the name implies, they use four wires to carry out the vital lighting functions. The four wires control the turn signals, brake lights and taillights or running lights. They also provide a wire for a ground connection.
Why does my 4 pin trailer plug have 5 wires?
Replacement 4-Pole Trailer Connector for Utility Trailer with 5-Wire Wishbone Wiring Setup When a 4-pole (4-pin) flat trailer connector actually has 5 wires this simply means it is a ‘wishbone’ style connector with dual running light wires.
How do you wire a 4 wire trailer to a 5-wire plug?
Rewire the Trailer
- Cut the 5-wire harness off the trailer’s tongue leaving as much wire as possible.
- Attach the 4-wire harness’s green wire to the trailer’s green wire with a butt connector.
- Connect the yellow, white and brown wires of the harness to the like-colored wires on the trailer with butt connectors.
What is the difference between a 4 pin and 5 pin trailer plug?
5-pin trailer wiring is very similar to 4-pin wiring, but it adds in a blue wire for the reverse or backup lights. Not all trailers have reverse lights, so consider your own trailer as you wire in a 5-way plug.
How does a trailer wiring harness work on a Toyota Tacoma?
Feed the rest of the trailer wiring harness through the hole, where the assembly sits, until you see it from under the truck. Use whatever clamps that came with your trailer wiring harness to run it along the frame, leaving the part that connects to the trailer in the middle.
How do you install a trailer wiring harness?
Remove assembly. With the tail light removed, remove the light bulb from its wiring harness. Connect the trailer wiring harness to the bulb from one side, and the bulb’s wiring harness from the other. Feed the rest of the trailer wiring harness through the hole, where the assembly sits, until you see it from under the truck.
Can a Toyota Tacoma be used as a trailer?
The Toyota Tacoma is capable of towing, but without a trailer wiring harness, you will be getting a big ticket. Learn how to install a trailer wiring harness here.