TIROL 4 Pin Trailer Tester Connector Trailer Wiring Tester 4-Pin Straight Trailer Light Wire Circuit Tester Car Accessories

Worked as it should. Simple!

Makes it easy to test trailer wiring harness without a trailer. Works as advertised.

Works great!

Good quality, well designed.

This device is great…!!! / I was thinking of making one of these using LED lights and an old ammo can. While on Amazon I stumbled across this. My electrical lines from my truck are old and my ground wasn’t connecting. Used my jumper cables to make the ground connection. With enough length you can operate the lights from the cab and look back to see the tester. A+

On time,as represented

Good product

This is beyond getting what you pay for. This is ridiculous. I took the chance and gave this a try. When I didn’t get anything to register on my truck, I tried my buddy’s truck, and his wife’s truck, and it didn’t light up or read anything on any of the three vehicles. Yet, all three have working electrical systems. You’re better off spending a little bit more money for a lot more of a tester. These are junk. Returning tomorrow.