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Trouble Shooting a Malfunctioning Wiring Harness on a 2017 Ram 2500  

Question:

Ok so I’m testing my truck only the negative is lighting up and trailer break - blue wire only light up how do I test the others?

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Expert Reply:

I recommend you check to see if your harness is grounded correctly and all fuses are good on your 2017 Ram 2500. You should also test the running lights pin on the truck side 7-Way connector while the lights are turned on in your Ram 2500.

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Jerred H

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