Mid 90 EZGO will reverse but not go forward

[jb5860]

I have a mid 90's 36volt ezgo. Batteries are charged. Unit will power up and go in reverse. But it will not operate when forward is selected. F/R selector switches are good (Reverse is only closed while in reverse). Solenoid clicks when the pedal is depressed but unit will not even hint at going forward. Also, if I keep the pedal depressed the A1 wires to the motor will get warm (not hot but is pulling current) I am suspecting the controller pack with something in the F1 F2 field winding circuit. Has anyone seen this and have any troubleshooting suggestions. Diode check appears to be ok based on a test diagram of a different controller pack. (Curtis PMC 1206 SX-002 pack).