ETUKER 7 Pin Trailer Light Plug & Socket Wiring Circuit Tester, 12V 7 Pin Trailer Light Connector Cable Wiring Circuit Diagnostic Testing Tools Tester, for Caravan/RV/Trailer Light Diagnostic

ETUKER 12V 13 Pin Trailer Lights Plug & Socket Wiring Circuit Tester is designed for testing the lighting circuits on both towing vehicles and Trailers/RV/Caravan/Boat/Car etc has one side to connect to the 13-pins plug of a trailer and the other side to the 13 pins socket of the towing vehicle Simply plug it directly into either 13-pin N-type plugs or sockets and gives a continuity test on all lighting circuitsifications: Material: Plastic & Brass Voltage: 12V DC Contents: 1pcs – 13 pin tester Color: Black Item Type: Diagnostic Tools Item Name: Trailer Tester Battery Type: 9V (the battery is not included)Way of use： 1. Connect the tester with plug or socket. 2. Press the yellow button on the side of the tester. 3. If the wiring is good, all the LEDs will light up Car (camper) 1. Put the tester in the socket of the car. 2. Press the yellow button on the side of the tester. 3. If the wiring is good, all the LEDs light up. Do the step again as Trailer guide beside. For Trailer (can be a caravan or bicycle carrier) 1. Put the plug in the connection of the tester. 2. Press the yellow button on the side of the tester. 3. If the wiring is good, all the LEDs light up. The function of each LED as “Signal of LED” showsIf a LED doesn’t light up, because the corresponding wire is defective. If all the LEDs don’t light up, then the mass wire is damaged or all bulbs are defective.