i had my trolling motor checked over by a service center and they found nothing wrong with it, then i hooked it back up on my boat and it does nothing. i have 25 volts at the inlet to the motor, when the pedal is pushed it goes to 2 to 3 volts, then when depressed it goes back to 25 volts. tested at the batteries they hold at 12.4 volts each with the trolling motor running, any ideas?