prodigy p 2 brake controller

I just had similar issues a couple of weeks ago. I went through EVERYTHING myself, the truck plug the wiring from the rear plugs to the cab. Couldn't find anything on the truck, started looking at trailer, brakes and magnet connections, still couldn't find anything so I decided to take it to an RV shop. They "looked" the trailer over, readjusted my brakes and gave it back to me. A week later same thing as you, the dreaded "OL" and "SH" (again)! Took the trailer back (again) to the RV shop, this time they wanted to "re-check" the truck too. STILL couldn't "find" anything but they mentioned to me I need to quit turning up the brake controller, I hadn't messed with it at all. Bottom line they put a new Prodigy 2 controller in like the one I had EXCEPT this one wasn't defective!! We're on week two of our 5 week adventure, right now in Missoula MT and NO controller issues!!!!!

I'm not saying your's is shot but after all the "checking" it was the controller after all. Good luck to you. Safe travels.

Dan