The RV 7-Blade Socket Tester offers a fast, easy way to isolate a lighting problem to the trailer or towing vehicle. A must have for anyone who deals with hitch and lighting hookup installations, it tests the output of towing vehicle’s RV 7-blade lighting socket. 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.
