The blower motor for a 1992 Buick Roadmaster is typically located either underneath the passenger side of the dashboard, within the engine compartment in front of the HVAC unit, or inside of the center console near the bottom. Depending on which location your blower motor happens to be situated, the access process varies significantly and can involve quite a bit of effort.
As for the blower motor fuse, most '92 Buick Roadmasters use a 25-amp fuse located within the under-hood fuse panel. There might also be individual relays controlling certain circuits that you might inspect. Be sure to reference your specific vehicle's literature for precise information on locations and fuse configurations pertaining to your car.
