Power and Grounds
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Battery positive voltage is supplied at all times to the sunroof and sunshade control modules from the 30 A S/ROOF/SUNSHADE Fuse located in the underhood fuse block. Ground is supplied to the sunroof and sunshade modules through the body ground circuit G402.
Ground is supplied to the sunroof and sunshade switch through the body ground circuit G402.