Pole Plug Tester

SAE 7 - Square Wheel Industries, Inc. (TrailerTester)

When there’s no time to waste the SAE 7-Pole Plug Tester provides a fast, easy way to isolate lighting problems to the tractor or trailer. Use it to test the output of SAE 7-pole tractor light cords, while connected to the tractor or to your Square Wheel Industries Trailer tester.