Trailer Wiring Diagram 4 Pin Round. Here is the standard for trailer wire colors and there functions. But if you only need the brake lights and taillights hooked up, why would you ever need more than four pins?
Cut the four-pin plug off of the trailer harness. I had no choice but to install the wiring while my boat was on the trailer, and Referring to a wiring diagram for a trailer comes in handy during installation. The wiring diagram is color coded and shows both the trailer side and the vehicle side.
I had no choice but to install the wiring while my boat was on the trailer, and Referring to a wiring diagram for a trailer comes in handy during installation.
Wiring up a truck for trailer towing isn't as hard as it looks; many new trucks come prewired from the factory, and there are kits that make the operation plug and play.
This is a short video series of the steps that I have taken to refurbish and old Utility Trailer that was designed and built by my father. Trailer wiring is very important to towing safety. The wiring diagram is color coded and shows both the trailer side and the vehicle side.