[48knees]

Good morning, our 2000 DS 48 volt series cart is making me crazy. All of a sudden when I pressed the throttle and nothing until about 1/2 pedal and full power. F&R. Then it was fine a few trips around the hood, then nothing, no movement, then fine. Next was at 1/2 pedal it would bump F or R .
Currently its on blocks and will turn wheels under power very intermittent and for a moment.
My mechanic ability is good my electronic ability is limited but determined lol. I'I've been reading and testing everything I can.
Batteries are 1 year old, tested with hydrometer all good. Charges fine.
Cleaned every contact point in the cart.
Dissasembled the Potentiometer, cleaned and shimmed the contact arm.Tested the unit before install and after, tests good.
Solenoid clicks and best as I can it test good.
I've jumped the OBC and no difference disconnected and jumped or connected.
The Controller is a bare aluminum Curtis. 3 bolt lugs 3 small terminals. I've tested this best as I understand but am lost.
Sorry for the long winded post but I'm ready to push it into the Bay, smash into it with my truck or put on some heavy metal and start smashing it to bits.