Since your key pad isn't working it would be time to replace it. Since you have a hydraulic setup you'd need the part # LC58CJ for if you have the Lippert Power Gear system or # LC74FR if you have the Lippert Level Up system. view full answer...
I just spoke with my rep at Tuson RV Brakes, the manufacterer of the Tuson DirecLink Base Model Trailer Brake Controller item # 335DL-100. He said that the older units had an LCD screen that wears out over time depending on the region you live in. He said humidity gets into the display and it slowly begins to fade until the entire screen goes dark. He told me there's most likely nothing wrong with your controller and you haven't done anything wrong but you will need to replace it with the... view full answer...