does this truck have the premium dash display? with 5 buttons ?
with key off press and hold the 5 key and it should start flashing through the codes stored in the controller. There will be 2 stages, drive control codes then hydraulic control codes.
The yales did this and i cant see why hysters wouldnt do it the same way.
as for the 99 code?
last time i had one that had this code i wound up replacing the controller, never did find out exactly what that code meant either, even after called the mfg. If you know someone at GE they might be able to tell you
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