Climate Control Seat Module Power and Ground
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. 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 CCSM through the battery positive voltage circuit and a 30 A fuse that is located in the I/P fuse block. This voltage is used by the CCSM to supply power to the TEDs and the blower motors. Ignition voltage is also supplied to the CCSM through the ignition voltage circuit and a 10 A fuse located in the underhood fuse block. The ignition voltage is used to power up the CCSM and allows the climate control seat system to operate only with the ignition in the ON position. The CCSM is grounded through the module ground circuit and G304.