7 To 13 Pin Trailer Light Tester Led Car Towing Wiring Check Tester Plug Socket
Just plug the tester in the 7 pin socket or the 7 pin plug of the trailer or caravan and press the yellow button on the side of the tester. 12V 7 / 13 PIN CAR TRAILER TOWING LIGHTS WIRING CIRCUIT PLUG & SOCKET TESTER.