T190 with intermitant "no hyd.function and drive"

I have a late T190 ser. 531615995 with intermitant "no hyd.and drive"

when working code is none

when not working ACS light is on with codes:

32-04 ACS not comm. with bobcat controller

75-04 no comm.from drive controller

39-16 left joystick not connected

40-16 right joystick not connected

I have wiring schmatics and was doing pin-outs for powers and grounds and noticed voltage was a little high 15.1v

I unplugged alt. so now volts is about 12.2v but still "no hyd.and drive" and same codes

I changed the ACS controller a couple months ago for a "no drive" issue and put it back now to test but still

"no hyd.and drive" and same codes I now put back the new ACS controller.

It seems if it sits over night it will work for awhile.

any ideas wally 808-479-3323

T190 with intermitant "no hyd.function and drive"