Atomic drive issue

I have the Atomic Truck 2016.

Everything works related to 12v like light, radio, wipers, etc., I was driving it and suddenly the foot pedal quit working, no drive no reverse, no clicking from any solenoid but still all small stuff like radio, blinkers, wipers etc still works. We had 3 other intermitten glitches before but now it doesn’t go. We have all covers taken apart to start diagnosis, where should we start? A both lifelong batteries charge and work and are good, power to and from the controller next to the batteries have power. Fuses all checked good and have power. We don’t know where the solenoid is at nor this pedal switch people talk about is at?