I had the same issue. but its different on two trailers. My 5th wheel will lock the wheels, but on my 30ft. goose neck cargo trailer. barely feel anything. thought maybe needed adjustment on the brakes, nope, might be a bad ground, Nope, What i ended up with I found the main brake wire undersized. I retro fit to a bigger wire then the brakes lock on heavy electric at 4. the same as my 5ver.
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2017 Ram 3500, Big Horn, 6.7, Crew, Long, DRW, Aisin, 4:10. Full timer in a Pinnacle
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