Tester 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.
Tester has LED indicator light. Designed to help quickly identify problems in the wiring of the trailer. Provides instant test of running light circuits. Features LED display to show completed circuit for the running lights, and turn signals.
Tester plugs into tow vehicle. LED illuminates to show if connections are correct and working.
Description: Trailer Plug Tester - Inline , Case: 12
Description: Trailer Plug Tester, Case: 12
For all 4 pole flat boat trailer plugs. Tests tail, stop/turn and ground connection.
"For all 4 pole flat "boat plug" connectors. Plugs into tow vehicle and bright LEDs illuminate to show if connections are correct and working. Tests tail, stop/turn and ground connection."