I did a search on CEG and there is tons of information on the moonroof.
Chris Hightower did an incredible job on his explanation one of the possible problems.
See:
web page The test I did with the dome lights dimming when I pressed the moonroof switchs proves that current is getting to the motor. This would then rule out the deadspot problem with the motor.
Something must be binding the motor then. Where are the scews hidden on the cover assembly. Any tricks I should know beforme removing it?