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TRAILER SOCKET & PLUG TESTER 7 + 13 Pin Adapters Wireless Socket Tester makes it easy to identify problems related to malfunctioning, malfunctioning trailer lighting. After pressing the test button, the tester analyzes the positions of the 6 diagnostic sockets. Fix lighting problems quickly and effortlessly. We especially recommend it to trailer owners, trailer rentals, garages, electricians, etc. The tester is powered by a 9V battery (not included). Professional diagnostics If any of the indicator lights do not light up, it means that the cable is damaged. Brake light - red Left turn signal - yellow Rear fog light or 12V - blue Left rear light - black Ground - white Right turn signal - green Right rear light - brown HOW TO DO THE SOCKET TEST connect the tester to the car socket - the indicators are red we turn on the specified light (e.g. stop) the indicator light is green, when the indicator light is red from the on light it means that the installation is faulty indicates a faulty installation or a burnt-out bulb Included: Socket tester Adapter 13/7 Adapter 7/13
