HUMMER H2 - 2006 Fuse Box Diagram HUMMER H2 - 2006 Fuse Box Diagram. Home; HUMMER; H2 - 2006 Fuse Box; These are some examples of symbols that may be found on the vehicle: v. While the alarm is set, the power door unlock switch is. not operational. If the alarm does not sound when it should but the. headlamps flash, check to see if the horn works. The.