Question about 2004 Lincoln Navigator
OK. Everyone, you need to understand the system operation. The main components are: Air compressor, air dryer, houses, solenoid valves, air bags, level arms, and automatic leveling module. 2003 to 2006 Lincoln navigator and most probably all the rest work the same. The compressor pumps the air in the air lines, then the level arms measure the angle (height) of each suspension by itself, sends a signal to the leveling module which in turns open or close the solenoid valve when the compressor is running or shut down. If running that is to inflate the bag and vise versa. It is quite very simple system. Now, if all you bags are deflated, then check the air compressor. The air compressor will go bad, mostly if there is a leak someone that forces the compressor to run more than its design ratings. If one only, it maybe any of the followings, the level arm is not sending the right signal, the solenoid is not functioning as desired, or the bag or the seals are leaking. If totally deflated unlike the others, without a sign that it is trying to inflate, but it leaks obviously, then check the control arm. If you hear it leaking, then get water and soap and try to find the leak. usually, it is a seal. Either the solenoid valve seals ($10) or the airbag seals ($25). Don't listen to all the drama on the internet that is calling to replace your air bag for springs. It is just marketing. One air bag, runs for ($150), Air compressor ($200). Easy fixes, even the airbag seals themselves.
Note, if your compressor runs every time you turn on your switch, there is a leak. Fix it fast to maintain your system integrity.
Posted on Jun 06, 2012
First, you should have a warning light telling you it is not working. There is a switch for the air suspension underneath the glovebox-right hand side or in the rear hatch area on the left panel..make sure it's on. If all 4 air bags are deflated it could mean the air pump or actuator is malfunctioning.
Posted on Jan 06, 2010
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Posted on Jan 02, 2017
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