I would suspect something other than the brake controller. I would be looking under the fiver for a loose brake wire or something like that. It's not usual for a brake controller to go bad.
What brand of brake controller do you have? Have you adjusted the trailers brakes, have you checked all of your connections?
Thanks!
Jeremiah
TV-2022 Silverado 2WD
TT - Zinger 270BH
WD Hitch- HaulMaster 1,000 lb Round Bar
Dual Friction bar sway control
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