A) Reset or replace waxer harness.
B) Cycle motor in waxer manual mode in diagnostics and verify 120VAC at the P6 connector on the Wax/Lift PCB.
If voltage exists, verify that the cable from the Wax/Lift PCB to motor has continuity.
If continuity exists, replace the wax motor.
If no continuity, replace the wire harness.
If no voltage exists, replace the Wax/Lift PCB.