99 lincoln naviagator that bounces bad and sits low in rear<

valve --line leak --shock leak or failure

bad shock

I was sitting at a stoplight. The other day in my rear airbags went out and now they won't fill back up with air. Does anybody know what the problem could be the airbags don't look dry rotted, or look like they have a hole in them

You must have a leak or its not pumping air like it should. This happened to my dads Lincoln towncar back in the day.

sounds like the leveling switch is pooched or the compressor is pooched check both start with fuses

it most likely blew a line going to the rear leveling valve to leval out the truck i would start there and then check the bags and the valve it self.

Remove battery, remove windshield washer bottle, remove air compressor and disconnect both air lines from the compressor dryer. Make sure compressor electrical wiring is plugged in, install battery, turn suspension switch to ON, turn ignition switch to the ON position, close all door and the compressor should come on and completely lower the whole truck. Once the truck is completely down, turn the ignition OFF, remove battery and connect both air lines. Install battery ensure electrical wiring is plugged in, turn ignition switch to ON, the compressor should come on and raise the vehicle to the correct ride height.

Spring and shocks have gone bad. Also check your A-Arms for break and cracks to make sure those are secure

Does the pump run? Check the pump fuse or air ride fuse.

the auto leveling is standard on the navigator.
first you have to understan that the auto leveling system is on front and rear of these trucks.
one way to tell is do you hear the pump running and do you have air in the front bags. and if you do you need a rear level sensor.
later paul