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)
