I have a Prodigy 3 controller installed in our Ford Expedition, which came with the wiring harness installed. Lately, when pulling our Silver Cloud
, the display on the controller will occasionally turn red with the short/no brakes
warning. However, touching the foot brake or using the manual control on the unit will return the display to green and the trailer brakes
engage. I can feel the brakes
engage, so I know they are working. When driving without the trailer, the controller display always stays green.
Other threads on a similar topic have indicated this as a bad ground or wiring short somewhere. However, I would think that a bad wire/ground would cause the brakes to not work at all at times.
Do you think I have a bad controller or what should I check? By the way, this happens without any big bumps, so it wouldn't seem to be a wire bouncing back and forth. Also the 7 pin plug on the trailer has been replaced since this issue first popped a few months ago and I've checked all wheel brake electrical
connections for tightness. Remember, the brakes do work!