Most sunroofs on cars these days are motorized, meaning that there is a small motor that opens and closes the sunroof. This motor is usually located in the headliner above the sunroof opening. In some cases, there may be a fuse for this motor, but in most cases, the only thing that will control the sunroof is the switch itself. If your sunroof is not working, it's likely because of a problem with the switch or the motor itself, and not because of a fuse.