MICTUNING 7 Way Blade Trailer Connector Tester with 7Way Test, Black
EASY TESTING: Just plug the 7 way trailer tester into the tow vehicle, check the LEDs to see whether they are working or not. Compatible with standard 7-way blade trailer sockets. MULTIPURPOSE USE: This 7 way blade trailer wiring tester tests for tail lights, brake lights, reverse lights, turn signals, brakes and auxiliary power.