JBM (51929) Towline Light Tester 7 Pole

Product Overview:

• This tester quickly indicates if there is any damage to the car cables or the trailer line. It is also useful for testing caravans and bike racks. It is equipped with two outputs, one for the vehicle's output and another for the trailer line input.
• Designed to easily check trailer lights, with one output to connect the 7-pin plug of the trailer line on one side and the 7-pin plug of the car on the other side.