[Test Your Trailer Lights and Be On Your Way]: Check each electrical circuit in your trailer and towing vehicle easily with the ABN 4 Pin Trailer Plug Tester; Straightforward design tests for continuity
[Quick and Easy To Use]: Simply plug in this car trailer light adapter trailer lights tester to check your circuit wiring is functioning correctly; LEDs will light up if circuits are running correctly
[Identify Connection Issues]: Split trailer wiring harness in half to identify if the issue is with your tow truck, utility trailer, camper, boat trailer, or horse trailer
[Bright Visibility]: 3 LED indicator lights identify whether the tail, left, or right signal light wiring is running incorrectly; 4 way trailer wiring tester bright red LED lights are easy to see
[Quality You Can Trust]: 2-sided 4 way flat trailer tester can be left plugged in or can be stored; Compact design fits in your pocket or glove box; Durable material ensure resistance to weather and wear