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Andrew Demaree
Friday, 10 February 2017 / Published in Auto Repair Information and Tips
4 way trailer light tester
Trailer light testers are devices for troubleshooting the wiring of a trailer and tow vehicle in a simple and convenient way. Most testers are small, portable, and are designed for ease of use. Having a plug, a battery, elementary controls, and a few indicators, the tester is pretty simple in its construction, which is why

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