1999 town car rear suspension dropped to the ground. can not pin point the problem
There are too many variables , but did you check. -compressor -compressor control module -compressor relay -air leaks -unfolded/collapsed air spring -does the compressor try to run? are there any codes or warning lights on the dash? Have the codes read as the suspension on that car will set a code when it malfunctions. Unfortunately you may have to go to the dealer to have these specific codes read. Most other shops don't but the specialized scan tools for every make and model but the dealer will have it.
1999 Lincoln Town Car Air Suspension
once ford air rides drop to the ground they break the control units at the top of the towers, there is no cure besides replacement. that is why there is a switch in the trunk. left hand side. when you lift the car you must deactivate the system or you have ruined the suspension. new air ride all the way around will run 1200 in parts alone. there are companies outfitting standard suspension kits for direct replacement that you can get into for 800 or so and never have air ride issues again.