FYI, both the cab A/C unit and the self leveling jack system are wired thru a 25A fuse under driver's side dash. The Tech I talked to said I had a blown 150A fuse blown in the engine compartment. The correct amperage of the two fuses in the engine compartment are actually 125 & 200.
I asked for and received prints for my elect. Systems, water systems, waste water systems, TV wiring, and will now be able to troubleshoot my own problems.