Hopkins Towing Solutions Led Test 7 RV To 6 Round Adapter Cp Electric Brake. These Towing Solutions from Hopkins Towing Solutions contain built-in trouble shooting that helps diagnose issues. The main pin (the 'master' pin) can be a 7 Blade and the center pin (the electric brake pin) can be either (auxiliaryy or electric brake). The light will only go off when the tow vehicle towing function is active letting you know everything is working correctly. The Hopkins Towing Solutions 47535 Led Test 7 RV To 6 Round Adapter has LED indicator lights that will come on when the system is towed. The adapter also has an opening that changes the pin locations for electric brakes and auxiliary brakes. An extra opening at the electric brake 'master' pin allows you to relocate the electric brakes to be either (auxiliary electric brake) or (master) to match the wiring of the trailer. The dust cover of the Hopkins Towing Solutions 47535 Led Test 7 RV To 6 Round Adapter contains an extra layer of weather proofing for long-lasting performance. Features of Hopkins Towing Solutions 47535 Led Test 7 RV To 6 Round Adapter Cp Electric Brake Function testing LEDs Center pin can be auxiliary or electric brake Adapter Type: 7 RV blade to 6 Round Incudes dust cover Built-in trouble shooting Package Contents: Hopkins Towing Solutions 47535 Led Test 7 RV To 6 Round Adapter Cp Electric Brake Hopkins Towing Solutions 47535: Led Test 7 RV To 6 Round Adapter Cp Electric Brake