Last week we went out to start our forklift and it wouldn't turn over. We did the obvious things we could think of, hooked up jumper cables from our big diesel truck, took out the starter and had it tested, and replaced the starter relay. But it still won't turn over. When we turn the key, we can get a clicking, but that's all. Not only that, but it has recently started making the clicking sound on it's own, with the key in the off position. No one here is really forklift savey, so any help would be great. The lift is a Clark model GPS25MB. Thanks.

-Dave