This Old Trailer: Troubleshooting the Ground Wire Video

You will first want to check the fuses on your tow vehicle. Some vehicles could have fuses for operating the turn signals and brake lights of a towing package. You will want to check if they are installed and working properly. The next thing is to…

Based on the information you gave, to mount the Ultra-Fab 2" Trailer Hitch Receiver for Trailer Frames #UF35-946403 I recommend boxing the frame at that location. If you don't wish to box the frame, then I instead recommend using the…

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…

My suspicion is that you have a poor ground connection somewhere on your trailer. The fact that everything works fine until the running lights are turned on is the dead giveaway. When the tail lights are turned on, the trailer lighting is drawing…

You should be getting 12 volts from each function when that function is active. The amperage will be less and can vary between functions. You can use a multimeter like #PT89ZR to check this. If you have a specific part number you want me to check…

I am glad you have managed to narrow down the problem by trying the trailer on a different vehicle. You have isolated the vehicle as being the problem. How to proceed from here will depend on whether your trailer connector is factory installed, or…

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…

The wiring harness #C56184 for your 2014 Hyundai Santa Fe would not work or would not work properly if it is not grounded correctly. It needs to be grounded to a clean and corrosion free bare metal surface. No paint or coating. And it would be best…

In regards to the Curt T-Connector Vehicle Wiring Harness #C56242 which is a fit for a 2022 Hyundai Santa Fe, you can troubleshoot this by testing the wires going into the converter box and seeing if they transfer through to the trailer connector…

Sounds like the power converter on your T-One Vehicle Wiring Harness, #118410, has shorted out and will need to be replaced. The converter is designed to divert the lighting signal when you turn on your lights or use the brakes or the turn signals on…

The 4-way on your trailer is what's known as a wishbone connector like part #A35W42B. Two of the wires are the running light circuit which is a little easier to install since you can run one down each side of the trailer. This way you don't…