Trailer Plug Testers

Anderson Marine 4 Way Flat Tester V5411Tester plugs into connector of tow vehicle and illuminates when the electrical connections are correct. Tests to SAE standards on flat 4-way functions for tail light, stop/turn lights, and ground.

Fulton Products 5-Flat Car End Tester with LED 20115Plug these testers into any car connector and you will have an instant test of running light circuits. Features LED display to show completed circuit for the running lights, left turn signal and right...