Plug the tester into either the car?s 13-pin socket or the trailer?s 13-pin plug, and press the yellow button on the side of the tester. The lights will flash and indicate if there are any faults with the lights of the vehicle.
? Tests 13-pin ?N? plugs and sockets
? Plugs directly into N-type 13-pin plug or socket to test all lighting circuits
? Portable and lightweight
? Requires 1 x 9V PP3 battery (not included)
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