Question about 2004 Lincoln Navigator
Vehicle Dynamic Suspension
The four wheel air suspension system is comprised of the following components:
Visual Inspection Chart Mechanical Electrical
Posted on Aug 05, 2010
The mid-2000s Navigators and Expeditions had some really poor quality air suspensions. At this point you're just going to keep throwing money at repairs if you try to keep that air suspension alive. Lots of people who own the Navis or Expos just convert them to standard coils. Comparable ride and will outlast the car itself.
Posted on Oct 05, 2017
I have a 02 lincoln continental some one replaced the two front struts with non-electronic ones,so the sir system wont fill the two rear shocks and bags,is there a way i can trick the module or manually open the Air Suspension Solenoid to allow me to fill them please email me at firstname.lastname@example.org
Posted on Nov 20, 2012
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Posted on Jan 02, 2017
SOURCE: owners manual ?
"looking 4 da relay"
there is a solid state relay for the air suspension system , it is next to or near the air suspension pump located at right front of engine compartment ( relay has a 4 wire connector , colors grey/red , light blue/pink , light green/red , and a dark blue/yellow , also behide the right interior kick panel is a fuse area , 3 fuses are involved with this circuit , fuse #111 - a 50 amp fuse , fuse #27 a 5 amp fuse , and fuse #20 a 30 amp fuse , and don't forget the air suspension service on/off switch . if your not 100% happy with my answer , tell me what i can do to help .
free owners manual ?, best i can say is try ebay , here is several available on ebay.
ebay 03 lincoln navagator owners manuals
Posted on Jan 23, 2009
There are level control sensors they look like little arms (with joints like your elbows) mountesd on lower control arms. They may be at fault they control the height and turn the pump off when the height is reached. try adjust height first before you replace, they can be adjusted. Good Luck
Posted on Dec 17, 2008
Check your Suspension relay under you front bumper on the passenger side most of the time it get loose or just corroded from the weather (snow , Water)... clean it up and put dielectric grease in it
Posted on Sep 24, 2008
that should not happen. Did you turn the switch off in the back for the suspension? Did you do something else at the same time, like check the spare tire for air pressure?
I have info on 2003 navigator 4 wheel air suspension. Maybe similar
SECTION 204-05: Vehicle Dynamic Suspension — 4-Wheel 2003 Expedition/Navigator Workshop Manual
DESCRIPTION AND OPERATION Vehicle Dynamic Suspension The four wheel air suspension system is comprised of the following components:
WARNING: Do not remove an air spring under any circumstances when there is pressure in the air spring. Do not remove any components supporting an air spring without either exhausting the air or providing support for the air spring to prevent vehicle damage or personal injury.
Air Suspension Pneumatic Diagram
Item Part Number Description 1 5319 Air compressor and drier 2 5B322 Air line T-fitting 3 5B321 Air line union 4 — Air line Y-fitting 5 18945/5311 Air spring and solenoid
Principles of Operation
The 4-wheel air suspension (4WAS) module commands changes in vehicle height that are necessary for both the load leveling and the vertical height adjustment features.
The 4WAS load leveling feature automatically makes adjustments in vehicle height so that the vehicle is always at trim height, and that constant front-to-rear vehicle attitudes are maintained over the load range of the vehicle. Adjustments in height that are necessary to correct height differences between the vehicle left and right sides for the 4WAS system are restricted to what can be reliably achieved with three height sensors.
The height adjustment feature has three vehicle heights within a two-inch span:
Kneel height — improves the ease of entering and exiting by lowering the vehicle one inch below the trim height in the front and rear when the vehicle ignition is in the OFF or LOCK positions and the vehicle is stationary.
Trim height — normal vehicle ride position; vehicle moves to trim position when the ignition is ON, when the transmission is initially shifted to DRIVE or REVERSE mode, when all doors are closed or when speed of more than 24 km/h (15 mph) is detected.
Off-road height — improves ground clearance by raising the vehicle one inch above trim height in the front and rear when the vehicle is at 4x4 low modes and the vehicle speed is less than 40 km/h (25 mph).
The 4WAS module uses the universal bus protocol, (UBP), module communications network for sending and receiving various signals with the exception of speed, information from the three height sensors, and the air suspension service switch. For additional information about UBP, refer to Section 418-00 .
The 4WAS system holds vehicle height when any door or rear hatch is opened. The system stores front and rear vehicle height the moment any door is detected open. The system then maintains this height regardless of the addition or removal of a load. The system returns to its commanded height when all doors are closed or vehicle speed exceeds 24 km/h (15 mph).
Air Suspension Service Switch
The air suspension service switch signal is needed to wake up the 4WAS module. Without the module receiving this signal, the 4WAS system is inoperative at speeds below 24 km/h (15 mph) and will not react when the vehicle is raised or lowered. At speeds above 24 km/h (15 mph), the system will be active as if the air suspension service switch is in the ON position.
Vehicles without message center When the air suspension service switch is in the OFF position and the ignition switch is in the RUN position, a "CHECK SUSP" will appear in the RH corner of the instrument cluster.
Vehicles with message center When the air suspension service switch is in the OFF position and the ignition switch is in the RUN position, the message center will display "SUSPENSION SWITCHED OFF"
Inspection and Verification
Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart Mechanical Electrical
I fthis does not help, the dealer can hook up his diagnostic equipment and download fault codes. Good luck. Please give best rating if this helps.
Posted on Apr 20, 2009
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
Posted on Oct 26, 2009
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