This is a ET A 94 0031D reach truck. The customer said that it would lift unexpectedly while traveling. They took the handle apart, stuck it back together then called me. I checked the lift pot and wires and all seems ok. Assembled the handle and when I go to learn it, it will not accept the final step when moving the lowering lever to down. It does the F and R fine, then move the lift lever to up, it takes that ok, then to down and nothing. I tried this control handle on another machine and it does the same thing, it won't learn the final step. So I got a handle that checks out to work fine and tried that on this machine. It won't even start to learn anything. Put the old controler on and the same thing, it learns travel but won't learn the lowering mode. I've tried 2 handles that work fine on other trucks but they won't learn on this one. Is this a systems card problem? Since I was never able to finish a learn on it is it retaining the original learn and that is why I can get it to travel ok with the original control handle? I'm stumped, any help would be fantasic. Thanks.