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2020 1500 - no voltage for running lights on 4 flat tow connector

jharding08

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2020 Dodge Ram 1500 Classic Warlock

On the way home from the lake, towing my jet skis, I noticed the running lights weren't working on the trailer. I did some troubleshooting today and the turn signals/brake lights work on the trailer, but the running lights (side and back) do not when I have the lights on in the truck

I got out my multimeter and confirmed 12 volts on the turn signal and brake for the 4 flat connector, but was only getting less than 1 volt on the running lights. It looked like the trucks back lights were working, but maybe its a fuse? There are so many on the diagram, I dont know which one to check.

Thanks for your help
 

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