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It Will Show And Tell Me If I Have Power Or Ground From The Truck On.
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In This Video, I Show The Basic Functionality Of The Rv Wiring Breakout Box And How You Can Use It To Diagnose Simply.
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It Tests The Left Turn, Right Turn, Tail/Marker, Brake And Backup Circuits To Indicate The Level Of Current In Each.
The wolfchester trailer light circuit tester allows users to power each individual circuit to their trailer, truck or caravan, allowing you to diagnose. Web ardie1962 90 subscribers subscribe 5.5k views 4 years ago i built a custom box to test truck and trailer lights. 100+ bought in past week.