If the motor is double-wound, you can run it from a 3-position e-unit (electronic or mechanical) by using only ONE of the two field windings. Just tape off the un-insulated end of the other coil and leave it disconnected.
If the motor is single-wound, you can’t make it reverse with a pendulum-style 2-position e-unit. You need a 3-position type to make it work.