Brake Controller Overload

Prodigy Controller (10 years old) works intermittently then fails and reads OL or SH.
Cleaned 7-way plug and inspected wires not including inside drum. Took the TT for a spin and brakes still work sporadically.

Checked wheel temps when I got home
Front
98. 116
82. 115

I recently repacked the bearings and magnets looked normal did not take a good look at the wires but did shoot some brake cleaner on the magnet spring mechanism and everything seemed fine. Maybe I set the brake too loose on left rear, or else it's shorting somewhere?

I'm wondering if the controller is failing as it was really acting wonky. When it's working, if I hold the brake it reads about 1.6 and after 3 seconds it drops to .06 and then holds at 1.0. That's not right. It should increase by a big percentage and hold. What the heck? Wire shorting, bad connection, or failing brake controller?

Ya'll have any ideas? I'll be obsessed with it until I get it fixed...