OK, typical troubleshooting here from the diagram in the FSM.
Fuse 15 feeds the actuator side of the Power window relay, with the real power to drive the windows etc., feeding straight off the Fusible link through the contact side of the PW relay.
Both fuse 15 and the fusible link are hooked in series with the sunroof switch, and both come directly before them. Fuse 15 through the small filament/relay actuator side, and the fusible link feeding through both the PW circuit breaker, then the high amp side of relay, then on to the sunroof switch.
That means it has to be either in the PW relay or PW circuit breaker since both systems are out on your car. The PW relay is underneith the driver's seat on a bracket along with the PW circuit breaker.