On a 2004 Lincoln Navigator. Where is the suspension compressor relay located. My vehicle was working fine. After I stopped to get something to eat, as I turn my vehicle On the lights flickered and the air suspension compressor didn't go on. Went to refuel. After I started the vehicle again the lights flickered once again and I heard like a clicking sound at the same time the lights flickered.

Did you check the compressor relay ? Location BJB - battery junction box , under hood fuse relay box . plus fuse #19 60 amp .this powers the compressor . If the fuse an relay or good Have a repair shop check for DTC'S - diagnostic trouble codes in the VDM - vehicle dynamics module . This module controls the air suspension . Do you know anything about automotive electronics an computers . (modules)

no it wont. the air suspension works as a complete system. each air spring has an electric solenoid, each corner has an electric height sensor and then the compressor itself. just energizing the compressor will not open the solenoids or sensors both of which are needed to raise the vehicle. what is probably happening is a failure in the computing system for the suspension system. expensive to repair.

The air bags are leaking, replace them as a pair.

Usually between the frame and the rear axles. A lever type device, should be fairly easy to locate. Check that the compressor is building air pressure and storage tank. Air bags not leaking and etc.

Replace the air suspension with conventional shock/strut
conversions. The Air Ride System is not worth investing
time and money ,after the vehicle is 5 years old.
Too expensive to maintain ,and too difficult to diagnose

Next time buy the Ford version of the vehicle

sounds like you have a bad pump. I have fixed dozens of them and 99 percent of the time it is a pump. the other thing is a pump relay or the control module. but not likely.

I have owned several air suspension vehicles. My Expedition was similar to yours. You may want to try the 4x4 switch because it will raise the body 1-2 inches higher. Checking its fuse would not hurt.

On most of my vehicles the suspension would work end to end, raising the front first. You could have 2 issues with the suspension. There should be valving to switch the air to the rear suspension after the front is up. I would wait longer for the rear to catch up.

If I had to guess why the front lifts first it would be to get the front off of the curbs and sidewalks when you park so the bottom doesn't drag.

There is a diagnostic plug for the air suspension and sometimes Autozone or Oreillys have the scanner for that special plug. If not, some alignment shops and all dealers would have it. Also Ford parts are often the same as Lincoln and cheaper., Someone may make aftermarket parts at a better price.

could be faulty compressor which pumps up the suspension,is it leaking from anywhere,causing the pump to work too hard,has it just packed up,check fuses but probably compressor

Here is how to tell if system is working.Get into the vehicle and close door. Set ignition switch to on position and move the gear shifter to neutral. After a few secs. you should hear the compressor turn on. If it comes on then put shifter back to park leave ignition on and exit vehicle. Compressor will stop when you open the door but should start back up in a couple of secs. after you close the door. You can then walk around the vehicle and listen for leaks.
If compressor does not come on there are 3 fuses and a solid state relay that controls it along with the module.
The 3 fuses are no. 109(50amp) in the battery junction box under hood.This is the direct feed to compressor thru the solid state relay. The other 2 fuses are located in the interior fuse panel and they are no. 6 (5amp) and no. 12(15amp).
What we usually see though if compressor does not run is either a bad compressor or the solid state relay. They both are rather expensive so I would have an experience tech look at it then.
However If you feel confident enough and have a voltmeter or test light respond back and I will tell you which wires to check.

The air chambers are worn out and this has caused a heavy load on the compressor, causing IT to become loud. The relay could be oxidized from excessive runtime...accordianman