7 Pin 12N Car and Trailer Socket Tester

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12N 7 Pin car and trailer tester for testing ISO1724/12N 7 pin circuits

LED indicators show any faults on the towbar or trailer lighting circuits

Requires 1 x 9V PP3 battery (not included) for testing trailer lighting

Not suitable for use with LED trailer lights

Towbar testing requires ignition to be switched on and each function activated in turn

Indicators will show green when function is tested and correctly wired, or red if a fault is present.