4-POLE CONNECTOR PLUG WITH CIRCUIT TESTER

4-POLE CONNECTOR PLUG WITH CIRCUIT TESTER. 4-POLE CONNECTOR WITH CIRCUIT TESTER Plugs into and upgrades vehicle's existing 4-pole tow plug Detects faulty wiring and incorrect connections Ensures vehicle's towing circuit is working properly LEDs instantly let you know whether power is reaching trailer Saves time finding the source of trailer light problems. Eliminates guesswork, troubleshooting—you'll KNOW what circuits are and are not working. Plugs in between the tow vehicle's plug and the trailer's plug.

$8.99