Back again, the forklift started working again on its own for a short time. Now it does it when it wants, usually when you need it the most. There is no trigger that I can find, and it only does it some times. It might go days without a problem, then have a problem every few minutes others. Just a few minutes ago, I went to check it because they were having problems every few minutes, and when I started to back it out, it stopped with a short alarm. I put it in neutral then back in reverse and it backed out fine. I put it in forward and drove it for about 200 - 300 yards and it did it again. I put it in neutral and back in forward, drove it for 20 minutes doing every thing I could think of that might trigger it, but it ran fine the whole time. I checked all the connections and the insulation on the wire and couldn't find any problems. as I stated before, this machine is only a couple of years old, and taken care of. physical appearance is excellent. I don't really know how to check the safety switches with it only having a problem sometime.