Complete vehicle wire harness test unit. Designed so that one person can make sure that a vehicle wire harness has been installed correctly and that all functions are working. It tests all tow vehicle functions including ground, auxiliary power lead, brake controller, directional and backup lights. It adapts to 4-way flat and 6 or 7-way round. Heavy duty, 20' extension cord is included. Puts you in the driver's seat when testing. Comes with attractive durable storage case to protect unit. Saves time and the cost of a second person at the rear of the vehicle.
