I just got this forklift from auction. It's a 1998 Yale Electric. Battery from 2012. 48V. Used it for a few days, everything OK. Then did an equalize charge a couple days ago, everything OK again. Checked all the cells, all fall within 2.09-2.125V, Acid levels all good, if not a tad high, but I'm using a cheap hydrometer.

Used it today for about 10 minutes, turned it off and then a few minutes later turned in on and it beeped and did nothing. Turn it off and on again, nothing. Unplugged the battery and let it sit a minute. Turned it back on and the start up screen did it's startup procedure a few times then stopped working. I checked the voltage of the battery it was at 49V, I threw it on the charge just to be sure as I've never had an electric forklift before. It charged for about an hour then turned off. So I assume it was full.

Any help would be appreciated.

I guess first off are there an interlocks that I should check. I mean if you're not in the seat will the display still turn on? I assume it would. Also not sure where the fuses are.