This handy tester easily allows you to pinpoint the lighting problem. The RV 4-Pole Socket Tester tests the output of the towing vehicle's lighting plug
Pocket-sized - weighs only a few ounces
An essential tool for shops doing hitch and lighting connection installations
LED indicators quickly identify complete circuits by glowing red. No Light means a problem circuit
Constructed of molded PVC for impact resistance
Internally grounded
Solid brass pins/sockets