Electrical Trailer TesterElectrical Trailer Tester Tester used for testing the operation of the vehicles lights as well as the trailers Operation: Vehicle Plug Tester The vehicle end of the tester is plugged into the vehicles female plug, allowing the user to test if the vehicles plug is wired correctly, and is receiving a signal. Simply press the button on the side of the unit. If all lights light up, then there are no faults. If a light fails to light up there is a fault on
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