Have a intermittent complete lift shutdown, when this occurs F1 is displayed and occasionally 61 and less often 59. the dash display then flickers and alarm sounds hesitantly, as if loss of power. My manual does not include a F1 fault. Suspecting a fuse i changed the F1 fuse with no improvement. This lift will fault and shut down daily for a few weeks then operate fine for months.
Toyota suspects the dash card or wiring. Removed the wiring and tested with loads, tests ok. ground strap and negatives ok. Steer motor brushes have been changed several times to remedy 59 fault. any advise would be appreciated.