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Troubleshooting Trailer Running Lights Not Working With 2019 Ram 3500

Question:

On my 2019 ram 3500 I have lost all park lights on my trailer. The park lights on the truck are good

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Expert Reply:

Typically when parking or clearance lights stop functioning, the issue is a poor ground connection so I'm confident that's the problem here. What you'll need to do is make sure your grounds are attached to bare metal surfaces and free of any paint, dirt or corrosion.

The other potential problem are your connectors. You will want to check the trailer connector on your 2019 Ram 3500 and trailer for corrosion, which can be green or white in color. A build-up of corrosion can interfere with the signals getting through the connectors so if it is present you can replace your truck's connector with the Mighty Cord Replacement 7-Way RV-Style Trailer Connector for Factory Tow Package # A10-7072VP.

For your trailer you can replace its 7-way with the Bargman 7-Pole Round Connector # 54-67-525.

Additionally, I also highly recommend using Dielectric Grease for Electrical Connectors # 11755 to help prevent corrosion, which is going to extend their lifespan. I've added links to a couple help articles for you to check out as well on trailer wiring.

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Kyle S

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