[major]

... Swapping the wiring on the motor would be messy, uncle wants to know if we can simply relabel the forward/reverse switch, does it matter, is there an intrinsic difference in the controller between forward and reverse functions of the EV-1B controller?

Many fork trucks run 50/50 forward/reverse so I don't think there is functional difference. I'd relabel the switch and try it. Rewire if necessary.

major

 

[Electric Forklift Guy]

Many fork trucks run 50/50 forward/reverse so I don't think there is functional difference. I'd relabel the switch and try it. Rewire if necessary.

major

The EV1 card doesn't even monitor which direction you are going.
Direction control is done externally , all the EV1 does is turn on a driver (labeled "PMTD") that allows the direction contactors to close.



You have full speed in both directions.
( Something you need to remember when backing up )