Does anyone know JD 490E PVC Ground source location?

My 490E has lost its ground source to the pump control module. The PVC connector diagram shows the pin outs on the PVC connector but I have lost the ground source feeding to them. Does anyone know the location of the ground source for the PVC? There are 4 pins intended to bring ground connections to the PVC, two (101,109) for the solenoids and two for the controls (38,47). I could install a new ground source but hesitate to change the wiring harness for future maintenance purposes. I...

Does anyone know JD 490E PVC Ground source location?

Does anyone know JD 490E PVC Ground source location?