Check all your fuses. in the dash if any and in the hood if any. Sounds like the circuit overloaded and shorted out.

There may be more underlying problems than you want to deal with. On the air suspension systems it can be very pricey and frustrating finding the problem with the car. My suggestion is to check out Strutmasters.com. They offer conversion kits for your vehicle at a great price. I put one on my moms Navigator and she loves it! Of course she loved the fact that she saved money too.