Descriptions: *Trailer tester 12 VOLT hand tester Lighting and cable tester for trailers/caravans and towing vehicles for 7-pin and 13-pin PLUGS and SOCKETS using the adapter supplied *Lighting and cable tester for trailers and towing vehicles (DIN ISO 1724). This handy test device guarantees the quickest and easiest search for cable line defects on trailers and towing vehicles. The defective cable colors are indicated by the device through LEDs. All 7-pin and 13-pin sockets and plugs can be tested *Simply plug the lighting and cable tester into the socket or plug to be tested, press the test button and a clear diagnosis is made via the LED display. Thanks to the internal battery supply, no external power source (running engine, car battery, etc.) is required. Trailers do not have to (may in test mode) be connected to the vehicle. Ideal in the commercial and private sector, for workshops, car and trailer rentals, accessories trading, etc. *Quick and easy search for cable and lighting defects in towing vehicles Properties: The following functions can be tested: Turn signals left and right Brake light Rear/tail light left and right Rear fog light Functionality: Insert battery (9 volts, block battery, not included in delivery) Plug the test device into the plug or socket with the respective pole, 7 or 13 pole (adapter) of the trailer Press the test button on the side If all LED lights are on, all lights are functional Technical specifications: 12 volts Adapter 7 to 13 pin Adapter 13 to 7 pin Material: plastic, PVC Color: Black Package Includes: 1 x Trailer Tester