Where Do Vehicle and Trailer Wiring Harness Ground Wires Connect  

For your 2018 Ford F-150 you just need the Curt T-Connector Vehicle Wiring Harness #C55774. This custom harness will plug right into the round US car connector that you mentioned under your truck to provide you with a fully-functional 7-Way…

The Blue Ox Patriot Braking Systems like part #BLU37TR all use a proprietary breakaway switch so you must use one from Blue Ox, the Second Vehicle Breakaway Kit for Blue Ox Patriot Supplemental Braking Systems part #BRK2505 which also comes with…

It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side…

I'll give you the run down on how to troubleshoot your trailer lights not functioning. The first thing to do is take a look at your owner's manual to locate any trailer fuses or relays and ensure they are all there and in working order. If…

What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the #3808 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test…

I checked with Lippert and could not find any information on NV304664. Do you know the capacity of the axle? If it is a 7,000 pound axle then the likely inner bearing is #25580 and the outer bearing is #14125A. If a 2-1/4 inch seal diameter is needed…

We can't recommend you drill into the base plate to mount the breakaway switch as that would void the warranty of the base plate kit. Instead I would recommend mounting the switch to the bumper of the vehicle.

As with the installation of lights on a trailer, the lights must be grounded, either through the mounting hardware which is the case for many lights. As with trailer wiring the #RM-155 needs the bulbs to be grounded to the vehicle to complete the…

The Roadmaster Nighthawk All-Terrain Tow Bar w/ LED Lights #RM-676 has a Locking tab up top that prevents the arms from pivoting down fully to the ground. If you don't fold the arms up and get the locking tab nut in the hole in the locking tab…

In some cases trailer lighting will ground through the hitch ball but that's typically only if the actual ground circuit is insufficient. This is not an ideal setup. It needs to ground through the wiring of the trailer harness. You can test this…

A hitch ball does not make a good ground connection for trailer lighting functions. The fact that the lights work for a bit after you hit a bump with the hitched trailer tells us that somewhere in your trailer and vehicle wiring there is an…