This Hopkins Towing Solutions 4 Flat LED Tester doubles as a dust cover to keep your vehicle side 4 flat terminals from corroding. The LED lights will test your wiring functions to make sure your lights are working properly. The 6 to 12 Volt Circuit Tester has an LED light that illuminates when power is found. It doesn't just work on trailer wiring either.
- Alligator clip for easy ground attachment
- Multi-use application
- Dust cover prevents corrosion to 4 wire flat
- L.E.D. indicator lights test left/right turn, brake and taillight
- Red L.E.D. light will glow if connection is correct
- 90 day limited warranty