Diagnostic Aids
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
The accessory DC power control module is protected from reverse polarity connections by a 200-amp in-line mega-fuse. The output current of the accessory DC power control module is lower than the fuse rating.