12N 7Pin Car & Trailer Tester Tests the Operation of Towing Vehicles

This electrics tester has LED indicators that show any faults on the towbar or trailer lighting circuits, the indicators will turn green when the function is correctly wired or red if there is a fault

Please note this is not suitable for use with LED trailer lights, and towbar testing requires the ignition to be switched on and each function activated in turn

Requires 1 x 9V PP3 battery for testing trailer lighting

Alternative part number - MP1804B