Electrical Tools - Tow Function Tester

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…

All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part #PTW2993 with one pin grounded and the other on the output pin.…

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

I would be happy to confirm the parts you referenced fit your 2019 Chevy Colorado and are compatible together. I have listed them below, along with any changes, and attached installation videos. Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar…

Your brake lights and turn signals for each side are on one circuit. The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect…

Both the Tekonsha Trailer Wiring Circuit Tester #8010 and the Hopkins Tow Doctor Trailer End Test Unit #HM50928 are for testing the wiring of your trailer. Both will work with incandescent and LED lights. However, the Hopkins will not display…

...little power for the tester to work properly. You could test the trailer side by using a separate 12 volt wire and applying power to each function. If the function does not work doing this test you know...

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…

Hey Jason, Really good questions and we can definitely address them. The tow package on your 2018 Ford Edge only gives the 4-way and there isn't a different option for the 7-way. So because you already have the 4-way with the tow package, the…

...do is use a circuit tester such as # PTW2993 to determine the functions of the 7-Way on the tow vehicle. Then you would place the red wire from the converter to the appropriate spot on the back...

Most trailer wiring problems are the result of a bad ground. What I would do is start with the connectors. Maker sure the connectors on both the trailer side and vehicle side are free of dirt and corrosion and that they are properly grounded. Next, I…

There are many things that can affect the voltage on the brake output wire from your brake controller to your trailer brakes such as the power setting on your brake controller, how you are testing the wire and if you are testing it with the brakes or…