1997 expedition 2 wheel drive air suspension problem

There is a Master deflate valve that is usually mounted on the drivers side under the front fender wheel well. That is if your compressor is not turning off.

The dump valve gets a signal when a door opens to lower the car for loading or unloading.

With electric work being what it is, a really good diagnostic machine can plug into your air controlled ride system and quickly and accurately spot the bad part.

It is cheaper to buy 1 correct part than several wrong part guesses.

Cheryl should of changed to standard suspension and gave up the air ride.

Lincoln Town Car Questions - Rear suspension - CarGurus

www.cargurus.com > Questions > Lincoln > Town Car

CarGurusFeb 7, 2015 - Rear suspension - Should the rear airbags deflate after I turn off ...seems to be no leaks cause the pump turns off and I don't hear it going off and on whiledriving. ... dead so you have leak when you jacked up car if not turn off air you could... car pumps up and bleeds off later the problem is NOT the leveler.

2002 Lincoln TC Air suspension not working - CarGurus

www.cargurus.com > Questions > Lincoln > Town Car

CarGurusJul 23, 2012 - 2002 Lincoln TC Air suspension not working - My 2002 TC airsuspension ... 2012 at 09:25 PM about the 2002 Lincoln Town Car Executive ... I did not pay attention that you said the compressor is OK. ... Rear Air Suspension 2 answers ... How can I test my Air suspension height leveling sensor on my 1997 ...

it is at the rear end and looks look a guide rail with a plug I would first try to clean the connector and apply carbon conductive grease/NOT LITHIUM==OR DIELECTRIC THERE THE WRONG STUFF/and see if it responds it's only been there for 161/2 years braving winter after winter and its either still good or done from a lack of attention needed taking it out and really cleaning just might save some$$$$$

Time to trade it in.

After replacing an air suspension bag on your 98 expedition you must recalibrate the air suspension system. this has to be done at a ford dealer

Caliper Removal

1. CAUTION: Do not use heat to loosen a seized lug nut . Heat can damage the wheel and the wheel bearings.
   Loosen the lug nuts.
   1. Remove the center cap.
1. With the weight of the vehicle on the wheels, loosen the lug nuts.
1. WARNING: THE ELECTRICAL POWER TO THE AIR SUSPENSION SYSTEM MUST BE SHUT OFF PRIOR TO HOISTING, JACKING OR TOWING AN AIR SUSPENSION VEHICLE. THIS CAN BE ACCOMPLISHED BY TURNING OFF THE AIR SUSPENSION SWITCH LOCATED IN THE RH KICK PANEL AREA. FAILURE TO DO SO MAY RESULT IN UNEXPECTED INFLATION OR DEFLATION OF THE AIR SPRINGS WHICH MAY RESULT IN SHIFTING OF THE VEHICLE DURING THESE OPERATIONS.
   Raise and support the vehicle.
1. Remove the wheel and tire assembly.
   1. Remove the lug nuts.
   1. Remove the wheel and tire assembly.
2. CAUTION: Replace the lining if worn to or past specifications. Replace the brake shoes and linings in complete axle sets. Inspect the brake shoes and linings for wear or contamination.
3. WARNING: BRAKE FLUID CONTAINS POLYGLYCOL ETHERS AND POLYGLYCOLS. AVOID CONTACT WITH EYES. WASH HANDS THOROUGHLY AFTER HANDLING. IF BRAKE FLUID CONTACTS EYES, FLUSH EYES WITH RUNNING WATER FOR 15 MINUTES. GET MEDICAL ATTENTION IF IRRITATION PERSISTS. IF TAKEN INTERNALLY, DRINK WATER AND INDUCE VOMITING. GET MEDICAL ATTENTION IMMEDIATELY.
   Disconnect the front brake hose (2078).
   1. Remove the front brake hose bolt.
   1. Remove the copper washers. Plug the front brake hose.
1. Disconnect the front brake hose
4. Remove the disc brake caliper (2B120).
   1. Remove the two caliper bolts.
   1. Lift the front disc brake caliper (2B121) off the front disc brake caliper anchor plate.
5. On 4x2 vehicles, measure the front disc brake hub and rotor (1102) thickness.
   • Replace the front disc brake hub and rotor if not within specifications 27.7mm Min.
6. On 4x4 vehicles, measure the front disc brake rotor thickness.
   • Replace thhe front disc brake rotor if not within specifications. 27.7mm Min.
7. Inspect the disc brake caliper for leaks.
   • If leaks are found, disassembly is required

I had a 1999 Expedition. When you put the 4x4 on it raises the vehicle an extra inch or 2.
It may help to turn the 4x4 off. Two wheel drive is a lower air setting.
Your original pump may still be good. The problem can be in the front. The compressor is not filling the front suspension to the cutoff point. It will lift the rear after the front end is at running height. Since you lost the front end first, the remaining air bled out there and then the rear came down. Once you shut down the car the suspension was done, all the air was let go.
There are adjustment solenoids on the body but you need someone qualified to repair this.

height sensor is a sensor that control air compressor on air shock.it keep vechicle level.if height sensor senses distance between frame and suspension .it will admit air to shock by controling the air compressor.check the air shock on driver side.BESURE TO TURN OFF ELECTRICAL POWER TO AIR SUSPENSION BEFORE RAISING VECHICLE.

do you have just rear air suspension? here's rear only. 4 wheel different. Deler an run a diagnostic test with WDS machine and get fault codes.
-------------------------------------------------------------------------------------
The air suspension system is designed to improve ride, handling and general vehicle performance for static, on-road and off-road driving conditions:

• Ride is improved by using an air type spring (the soft ride is inherent).
• Handling is improved by maintaining constant vehicle attitude.

The system consists of unique rear air springs, the air compressor, air lines, air spring solenoids, height sensor, air suspension control module, attachments and associated signals derived from both driver and road inputs. With these components and signals, the air suspension control module commands changes in vehicle height that are necessary for the load leveling features.
The load leveling feature rear air suspension (RAS) systems shall automatically make adjustments in vehicle height so that the vehicle is always at trim height and constant front-to-rear vehicle attitudes are maintained over the expected load range of the vehicle. Adjustments in height that are necessary to correct height differences between the vehicle's left and right sides for the RAS system shall be restricted to what can be reliably achieved with one air suspension height sensor.
The system uses one air suspension height sensor, a steering sensor, generic electronic module (GEM) and other vehicle sensors to measure driver and road inputs. The system changes vehicle height using an air compressor, two air lines and the use of air springs with air spring solenoids.
The air suspension system holds vehicle height when the rear hatch or any door is opened. The system stores rear vehicle height the moment any open door is detected. The system then maintains this height regardless of the addition or removal of a load. The system will return to its commanded height when all doors are closed or the vehicle speed exceeds 16 km/h (10 mph).
----------------------------------------------------------------------------------------
Air Suspension Height Sensor
One air suspension height sensor is mounted on the vehicle. The air suspension height sensor sends a voltage signal to the air suspension control module. The output ranges from approximately 4.75 volts at minimum height (when the vehicle is low or in full jounce), to 0.25 volts at maximum height (when the vehicle is high or in full rebound). The air suspension height sensor has a useable range of 80 mm (3.2 in) compared to total suspension travel of 200-250 mm (8 to 10 in) at the wheel. Therefore, the air suspension height sensor is mounted to the suspension at a point where full rear suspension travel at the wheel is relative to 80 mm (3.2 in) of travel at the air suspension height sensor. The air suspension height sensor is attached between the No. 5 frame crossmember (upper socket) and the panhard rod (lower socket).
When the air suspension height sensor indicates that the rear of the vehicle is lower than trim under normal driving conditions, the air compressor will turn on and pump compressed air to the air springs. When the sensor indicates that the rear of the vehicle is raised above trim under normal driving conditions, this will cause the air to be vented from the air springs to lower the vehicle back to its trim height level
------------------------------------------------------------------------------

• Uneven vehicle height

• Circuitry.
• Rear pneumatic fault.
• Air compressor assembly.
• Air suspension control module.

• Go To Pinpoint Test I .