I believe that is what not working correctly. When the tilt lock out comes on, it stops all tilt function until the forks are lowered under height switch. I know that when u raise past first stage, the forks only go forward bout 2 degrees, but you're still able to tilt back, with this truck, you can't once the tilt limit is reached. That's what I'm trying to figure out is why it shuts down all tilt when tilt limit is engaged. It's weird that even tilt back doesn't work. I have even check the schematics and thought it might be the tilt interlock, but AC trucks don't have that. So that's a no go.