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![Amazon.com: 4-Way Flat Trailer Wiring Tester [Nickel-Plated Copper Terminals] [Male & Female] [Continuity Test] 4-Pin Trailer Light Wire Circuit Tester : Automotive](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/714csEeqykL.jpg "Amazon.com: 4-Way Flat Trailer Wiring Tester [Nickel-Plated Copper Terminals] [Male & Female] [Continuity Test] 4-Pin Trailer Light Wire Circuit Tester : Automotive")
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