2008 Navigator Air Suspension Off Q?
 

2008 Nav and the battery died last week and when we replaced it, the previously fully functioning air suspension won't turn on. When I go into the Driver Command Control thing, there is not option to turn it on, it just says "Off." I checked the fuses and none were blown, and I don't hear the compressor running at all. The truck hasn't lost any air as far as I can see because it sits just like normal.
Is there some kind of "system reset" that I should perform after replacing the battery? When I run the little system diagnostics, there are no problems except that the air suspension is off.

I searched the forum but got no real answers other than take it to the dealer. Thanks.