Tow Doctor™ Vehicle Wire Harness Test Unit
Tests all tow VEHICLE functions: ground, auxiliary
power, brake, direction, and backup.Designed so that one person can make sure a vehicle
wiring harness has been installed properly and all functions are workingHeavy duty, 20..
Tow Doctor™ Trailer
Wire Harness Test Unit
Tests all TRAILER functions: left turn, brake, tail, backup lights;
electric brakes and auxiliary powerDesigned so that one person can make sure a trailer has been wired
properly and all functions are workingTra..