How to Change a Trailer Plug

How to Change a Trailer Plug!

Changing the plug for your trailer wiring is relatively straightforward and an easy project that will save you money. As with any wiring project, you will need to determine what type of plug you have already so that you can replace it with the same style, unless you need more functionality from your harness. Trailer wiring is color-coded and standardized, making it very easy to replace the plug without needing to remove the entire wiring harness. Determine the style connector you will need to replace your existing plug. There are several styles, so be sure yours has all the wires you will need to make the lights, brakes or anything else you may be using on your trailer function as needed. Inspect the wiring on the trailer to determine if it is still usable. If it is in good condition, you will only need to cut the wiring harness near the plug to replace the connector.

Cut the wires using a pair of wire cutters and strip off about 1/4" of insulation from the wire. Strip the corresponding wire from the pig tail of the new connector in the same way.

Slide a small piece of heat-shrink tubing over the wire and then push it down so it is not in the way. Slide the stripped wire into a crimp-on style butt end connector and crimp the end of it, securing it to the wire. Make sure you use crimping pliers so that you get a good, solid crimp. Insert the corresponding wire from the connector into the opposite end of the butt end connector and crimp it with your pliers. Slide the heat shrink tubing over the butt end connector and apply heat evenly over it with a small butane torch until you see glue coming out the end of the connector. Move to the next wire and repeat the process. Continue this procedure until the new connector is installed on the trailer wiring harness. If you want, you can wrap the repair with black electrical tape, but the heat shrink tubing is weather tight after it has been applied to the connector.

Things you may need:
· Wire cutters
· Wire strippers/crimpers
· Crimp-on connectors
· Heat shrink tubing
· Small butane torch
· Black electrical tape