Oyviny 7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Trailer Socket Tester

Whether you have just installed a new vehicle-to-trailer wiring harness or are trying to locate the cause of an electrical problem, this tester is great for testing taillights, brake controller output , back up or reverse circuit center pole, right turn/brake, left turn/brake and 12-volt power.

4 & 7 Pin Trailer Tester Great WAY TO TEST YOUR TRAILER PLUG Part of towing responsibly is making sure your trailer lights are working properly.

This tester helps troubleshoot and get your trailer connectors all right before picking up your trailer.

2 in 1 Trailer Tester! Test Different Trailer Connectors!