NB PARTS Test connector

For testing lighting circuits on vehicles, trailers, and RVs
The plug plugs directly into a 7-pin N-type plug or socket and allows for a continuity test on all lighting circuits. Requires a 9 V battery (not included)
Vehicle Test: Connect the tester to the vehicle’s power outlet. Turn on the ignition. The lights on the tester will illuminate if the circuit is functioning properly.
Trailer test: Connect the tester to the trailer’s power outlet. Press the yellow test button. The lights on the tester will illuminate if the system is functioning properly.