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)
