I tow a 38ft fifth wheel so it's important that the brakes work on it. As I pulled off the freeway and the trailer pushed me halfway across the intersection at the end of the ramp, I knew something was wrong. I do all my mechanical work with everything I have for two reasons; Cost and I've been ripped off too many times. The only way to really diagnose a problem with this module is to use a brake force meter that plugs into the trailer's 7-pin socket. You can get them here at Revain for less than $150. Cheap compared to what an RV dealer or mechanic charges to diagnose a problem.
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