Lowered front suspension

[Ronnie82]

I have a 2012 Hyundai Equus I changed the front arm on the driver side and when I put it back on the front air suspension won't raise but the back does but I never took nothing apart so how do I fix it

 

[Rey]

Equus air suspension acts strangely to any uneven inputs. In my own experience my front end collapsed and my rear rose to top height when I changed the oil (jacking up the front wheels). It was towed to the dealer and enroute the fault cleared itself. Now, whenever I jack the car for any reason I disconnect the battery.
So, in your case I think it is just a stray event; and your suspension computer needs to be rebooted - tow it to your friendly dealer.