EZ TROUBLESHOOTER Circuit Tester

Just what we needed. Got the replacement wiring harness for a trailer and still had issues with the lights. This saved a lot of second guessing and found the problem - which was the last thing suspected. So instead of going thru all the wires and connections, this found the problem quick! Wasn't even thinking of one of these when we bought the harness. Glad we got it! Worth every penny - saved a lot of time and frustration.

Did the job

This tester works great. I keep in the glove box in my car. Recently I had my car in the shop so I took it out of the glove box with some other stuff I didn't want to go missing. Later I couldn't find it. It had fallen on the carpet between the console and the passenger seat which here all black. I drilled a small hole in it and put a small piece of neon green cord through it. Now it is easy to spot. Hope this idea will help someone avoid losing one. .

Works as expected, only draw back I had use a mirror to see the LEDs on my Silverado

Great little tool to check if your trailering connections on your vehicle are working correctly (L and R turn signals, brakes and tail). Using it on a 2018 Chevy 2500HD Crew Cab. The one little caveat is that on my vehicle, you have to read/view the lights from the ground up as when plugged in, they are on the bottom. Not a huge deal, but would be nice if you could view from top looking down.

I have a Toyota Highlander and am pulling a very small U-Haul trailer. Ordered the wiring kit online, hooked it up, went down to U-Haul and they didn’t have one of these testers so they had me back up to a trailer, plug in and the lights didn’t come on. He said for me to rent a trailer the lights had to work. Figured I must of hooked something up wrong. Instead of driving back down to the U-Haul place every time I needed to test if my wiring was correct I just ordered this tool and it worked flawlessly! For $4 bucks it was definitely worth it! Now I just have it in my glove box and anytime I’m hooking up a trailer I can test my lights easily to know if my lights aren’t working or if the trailer lights aren’t working.

can't check electrical stuff to save my life. fortunately this was easy! car came from factory pre-wired for a hitch. curt wiring harness plugged right in to factory outlet. plugged this tester into the 4-prong end of harness and it lit up when lights were turned on, turn signals went left /right. money well spent for piece of mind. couldn't check the brakes because it was just me. so will check it when i have a helper.

Works as expected. I set my phone up to video record the lights. Then, I hope in my truck and run through all the lights (turn signals, running, brakes, etc.). Watch the video to see which one isn't working, and then troubleshoot from there if needed. A voltmeter works for that too, this is just easier. A good idea to bring with you when buying an older used truck for towing. So when the dealership sales person says the trailer lights work, you can prove them wrong on the spot. Wished I had it with me on the lot. Would have saved me some hassle at home.

Excelente servicio y precio

A simple but effective tool. Built solidly. Connects to 4 pin trailer light block. LED lights are bright and easy to see. Aids in trouble shooting trailer lighting problems. Best few bucks you will spend to save lots of frustration wiring and fixing trailer lights.

Easy to use, will quickly diagnose any issues with your trailer light control box.

Great value and allows you to test your vehicle to trailer wiring without the trailer, plus helps to isolate the source of any fault you’ve got.

C'est bien