I'm a happy owner of a Hustler Fastrak with a 54" mowing deck until here lately. The mower stopped engaging. Ohmed out the pto clutch=0. Replaced the clutch. Still nothing. Replaced the ignition switch, voltage regulator, starter solenoid and pto switch. The seat and neutral switches are all bypassed for testing. Still no deck action. I have 33 vac at my voltage regulator, and 14.4vdc coming out. I am at wits end on this thing. What else do I need to check\replace???