[Daryles]

I had intermittent connections. I used #200 sand paper and contact cleaner to clean the 7 way cable contacts. To get inside the female pins I rolled up a piece.
Then I took the cover off the junction box and gave each wire nut a squeeze with pliers.
That worked for us.
Last year before getting on the road I jacked up the rig and tested the brakes from the pedal and from the break away switch. I had one tire that would not lock up. I discovered the wire inside the drum had worn in two. Easy splice fix.