7 WAY RV BLADE TESTER (58271W)

7 WAY RV BLADE TESTER Part Number - 58271W Having electrical issues with your trailer's electrical parts? This tester plugs directly into the male plug of you towing vehicle and allows you to test the wiring from your vehicle to the plug so you can be sure where the issue is located. If all lights work on the tester this will help you determine the problem is on the trailer side. This will test your wiring from your vehicle to the plug 12v 12 volt power LT Left turn/brake TM Tail lights RT Right turn/brake BU Back-up or Auxiliary BK Electric brakes