2011 model year, PX-8 motor. Engine fan won’t shut off, on full time. Truck is a former BJ Services fleet truck. Have a hunch former owner rigged it somehow to have fan on full time. No noise from fan clutch when turning on ignition, even with full air. No air from fan solenoid on fire wall when pulling off air line to fan clutch, with engine running, and flipping fan switch in cab.