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Four-Way Trailer Light Tester - 66526 view this item at harborfreight.com »

Ratings: (5 is best)

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Review by Goomer on April 2nd, 2016
Followup: It is still listed at Harbor Freight. Their rating system gives it 2 out of 5 stars.
Review by Goomer on April 2nd, 2016
One of those rarely used, but a much appreciated gizmos when I need it. Ever had one of these scenarios? One of the trailer lights is not working. Is it the trailer or is it the vehicle. My suspicions generally fall to the trailer, but that isn't always the case. This little goodie can save a bunch of time in trouble shooting. Just plug it into the vehicle end and try the flashers, brakes and headlights. If one isn't working the green LED doesn't light up. If all are working, its probably the trailer. Not a necessity, but for under $4, the time it saves is worthwhile for me. Significantly less expensive at Harbor Freight than what I see on Amazon or eBay.

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