To find the correct fuses, you'll need to consult your 1985 Corvette's owner's manual or a wiring diagram. The manual will have a fuse box diagram showing what each fuse protects. Look for fuses labeled as "Headlights," "Headlight Circuit," or something similar. There might be separate fuses for the high beams and low beams, but the motors will be on one of these circuits.
If you can't find the information in your owner's manual, searching online for a "1985 Corvette wiring diagram" might help you locate a schematic showing the fuse layout. Remember to always disconnect the negative battery terminal before working with any electrical components in your car.