the 1a circuit just bypasses the controller and provides full battery voltage to the motor as soon as the directional contactor closes.
I would still like to see a picture of the controller to be sure, but almost any part you need for the controller can either be had at fight systems (FSIP.biz) or if they don't have the part on the shelf to send you first, you can send them the part and their re-builders can go through it and return you a completely repaired unit.