ERC040AGN36TE084
SNA814V04651W

Codes showing 03, 11

Bought it used, worked great few months, yes it's old, battery is good enough for what we do and is over 36V

when turn on main power contactor clicks on, can run mast controls, steering pump contactor doesn't close but pump is fine when override, no main drive motor power.

Looking at the machine the only "smarts" I can find that would disable these functions is the small 3x3x1" or so potted block with large multi-pin conn in the rear compartment and the function display on the dash. If anyone could point me to a schematic that would be great. Or fault code sheet with what 03, and 11 mean. Also I guess could be the GE motor controller box in rear? Any help appreciated.

Thanks,

Erich