Batteries show 36 volts. All fork action seems normal but we are not getting power to the drive unit. The gauge on the dash is dim and shows only about 8% charge.

This has happened once before, before I had the responsibility and it apparently cured itself. The mechanic they hired could not find a problem. Apparently this happens when the forklift has been wet. It has not been wet this time but the humidity has been off the scale here for several weeks.

Any suggestions?