4/5-Way Pin Trailer Circuit Tester

Tests both 4 and 5 pin vehicle side connections for faulty wiring. LEDs light up to corresponding circuit. If LED does not light up, the circuit is not receiving power. Double sided unit allows the user to plug in-line with the trailer, leave plugged in while on the road. Made of hard ABS plastic - durability for long life. 1 year limited warranty.

Plugs into the trailer plug

Each LED light corresponds to the circuit being energized

Provides an easy to connect ground terminal for trailer lighting set up