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Ultra-Tow 7- and 4-Way Circuit Tester, Model# DBP7+4

Item# 578224
Tests power supply from tow vehicle to trailer and determines if vehicle is properly wired. Tests both 7-way round and 4-way flat tow plugs. Plug into the vehicle's tow plug and operate lights, brakes and turn signals to test circuits. Reduces trouble shooting time. Tester only.
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