Question about 1991 Lincoln Town Car

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Replace air dryer for air ride system

The pump is working so I removed the dryer and tried to push compressed air through it to see if the car's rear would rise. I think it's clogged so I wanted to remove the air line from the dryer and push air through the lines. I can't remove the air line from the dryer. Is there a trick to doing this? there is nothing to indicate I need to use a wrench. ?????????????????

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  • rosasr Dec 17, 2008

    There is a metal piece or fitting that does come our about 1/16", not made to fit a wrench. The part guy at the dealership said maybe you push it in the pull out . It didn't work. There was some corrosion around that connection. mabe thats the problem?The air line has a white core that goes into the fitting/ dryer. The outside black line is just a cover of sorts.

  • rosasr Dec 18, 2008

    I had a service advisor call me and the trick is pushing the orange ring down or in on the fitting and holding it while you push the air line in and then out. It came off easy. I do have one other question. Is there anything else along the air line that could cause problems? I pushed compressed air through the line with the ignition switch on and the car began to rise. I then pushed air through the dryer and I think I blew out a clog not really sure but I put it all together and it works fine. My original problem was that the car suddenly lost all air pressure and sank to the ground. The pump was working so I removed the dryer and tried to push compressed air through it. Nothing happen but I didn't have the ignition on. Would that make a difference? I ask this because when I removed the air line and tried to push air through to the bags nothing happen. The ignition switch at that time was off.

  • yadayada
    yadayada May 11, 2010

    is there a coupler around the hose?

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Maybe you don't have that red plastic ring?   It pushes the brass ring  inside the connector.  Normally you push the air hose in a little, then hold that plastic ring with your fingers, and pull the hose out.   But if you don't have tat red plastic ring then you would have to use special tool which would push the brass ring inside.  

Posted on Mar 09, 2009

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  • Lincoln Master
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U push it in and pull it out, if it has never been off it can be a bear, have broken more than one while I was a Ford tech at a new car dealer.

Posted on Dec 17, 2008

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I have a 1994 lincoln mark viii. the front air bags keep deflating and sometimes stay up. every now and then you can hear the pump and it makes weird noises and will not pump at all. its like i am driving...


Unfortunately, it sounds like the air compressor for your air ride system is not working. But before you replace make sure that the height sensors haven't gone out which would bleed deflate the bags. SunCore Industries has about the best prices for the air compressor, dryer and air struts and bags.

Changing them is no picnic, but there is plenty of information at SunCore on step by step instructions to do it.

I have a 96 Mark VIII and have had to replace the rear bags and two height sensors and the air compressor so far, but when they work as designed they are a very smooth ride. A friend went with the replacement non-air ride and there is a big difference in how it rides.

Sep 10, 2011 | 1994 Lincoln Continental

3 Answers

What is the common issue regarding the air bags for the suspension?


there is a ride hieght sensor on rear lower control arms creck for damage and connection.over load rear suspention,4/5 people on back bumper with key on see if pumps up.also check fuses.try jumping compress to test compressor.worst case replace struts and use coil springs,eliminating air ride issues.

Feb 18, 2011 | 1997 Lincoln Mark VIII

1 Answer

The air suspention pump is not working


Use a test light to the air suspension pump to see if it is getting current. I assume that the rear end is sagging a bit as far as ride height, due to the pump not working. Also, may try to remove and replace pump, assuming that's the problem, and then when the rear air shocks pump up, make sure there are no leaks after shutting down the vehicle.

Also, make sure that the shut off switch for the suspension isn't flipped to 'off.'

Jan 08, 2011 | 1991 Lincoln Town Car

1 Answer

Where is the a.i.r. pump located



The air pump for the secondary air system (emission control device) is located under the battery. If you do replace it, replace the check valve too, it is on top of the exhaust manifold and connected to the pump with a hose. The check valve fails and ruins the pump. Source(s): http://repairpal.com/volvo-850-1997/comm…
http://repairpal.com/air-pump-check-valv…
http://repairpal.com/air-pump

OR


I think they are talking about the pump to provide vacuum to the climate control when the turbo is putting boost in the intake manifold. The vacuum can come from an electric pump or from an engine driven pump, something like an old engine driven fuel pump. I needed an electric pump for my 765T, and all the wrecking yards wanted to sell me the engine driven form. (A new one was $500, and it wasn't that important to me.)

An engine that takes the engine driven pump will have a hole in it while the others will not have a hole. Source(s): 35 years maintaining my own cars, including 17 years with a 1985 765T


OR



Rear Suspension Leveling Air Compressor
RH front of vehicle, attached beneath the fascia

Rear Suspension Leveling Air Compressor Relay K19
Lower I/P, to the RH side of the steering column, on the relay box


Automatic Level Control System Operation Check
Support the rear wheels or support the rear lower control arms when certain tests require raising the vehicle on a hoist. Use two additional jack stands in order to support the rear lower control arms in the normal curb weight position when a frame type hoist is used. Refer to Trim Height Specifications in Suspension General Diagnosis.

Refer to ALC Suspension System Check for electrical troubleshooting of the Automatic Level Control (ALC) system, or if DTC's are present.

Diagnosing Leveling Complaints Without DTCs Present Procedure
Perform the following preliminary inspections before performing the system performance test:

Inspect the ignition (pin A & pin H) at the ALC sensor connector.
Ensure that the ignition (pin A & pin H) at the ALC sensor connector connection is secure.
Inspect the ground (pin E) at the ALC sensor connector.
Ensure that the ground (pin E) at the ALC sensor connector connection is secure.
Inspect the ALC sensor link.
Ensure that the ALC sensor link is properly secured to the actuator arm.
Inspect the ALC sensor actuator arm for damage.
ALC Diagnosis Table Step
Action
Value(s)
Yes
No

1
Has the ALC compressor assembly and the air tube been replaced?
--
Go to Step 7
Go to Step 2

2
Raise and support the vehicle. Lifting and Jacking the Vehicle in General Information.
Inspect the air tubes running from the ALC compressor to both rear shock absorbers.
Inspect the air tube connection at the ALC air dryer.
Are the air tubes damaged and/or disconnected?
--
Go to Step 13
Go to Step 3

3
Squeeze the left rear shock absorber in the middle of the air sleeve.

Did the air sleeve slightly compress?
--
Go to Step 5
Go to Step 4

4
Operate the ALC system for 60 seconds.
Test the air tube-to-air dryer connection for leaks using a soap bubble solution.
Is a leak evident?
--
Go to Step 20
Go to Step 5

5
Disconnect the air tube from the ALC dryer.
Connect the Pressure Gauge to the ALC dryer.
Close the toggle valve on the Pressure Gauge .
Operate the ALC compressor.
Did the pressure build to the specified value?
80 psi
Go to Step 6
Go to Step 10

6
Shut off the compressor when the pressure reaches 80 psi.
Monitor the gauge for 1 minute.
Did the pressure leak down?
--
Go to Step 10
Go to Step 7

7
Connect the Pressure Gauge to the right rear shock absorber. Ensure that the toggle valve on the Pressure Gauge is away from the shock absorber.
Close the toggle valve.
Pressurize the shock absorber at the toggle valve on the Pressure Gauge to 80 psi.
Monitor the gauge for 1 minute.
Did the system leak down?
--
Go to Step 11
Go to Step 8

8
Use the toggle valve on the Pressure Gauge in order to slowly release the air pressure.
Disconnect the Pressure Gauge from the right rear shock absorber.
Connect the Pressure Gauge to the left rear shock absorber.
Pressurize the Pressure Gauge to 80 psi.
Monitor the gauge for 1 minute.
Did the pressure leak down?
--
Go to Step 12
Go to Step 9

9
Use the toggle valve on the Pressure Gauge in order to slowly release the air pressure.
Disconnect the Pressure Gauge from the left rear shock absorber.
Connect the Pressure Gauge , inline, at the tee near the rear of the vehicle.
Reconnect the air tube to the ALC dryer.
Open the toggle valve on thePressure Gauge .
Using shop air, pressurize the system to 80 psi at the service connection of the Pressure Gauge .
Monitor the pressure gauge for 1 minute.
Did the pressure leak down?
--
Go to Step 14
Go to Step 20

10
Replace the following components:

• Replace the ALC compressor. Refer to Air Compressor Replacement .

• Replace the air tube. Refer to Air Tube Replacement .

Are the replacements complete?
--
Go to Step 20
--

11
Slowly open the toggle valve on the Pressure Gauge in order to relieve the air pressure.
Replace the right rear shock absorber. Refer to Shock Absorber Replacement in Rear Suspension.
Reconnect all of the air tube connections.
Is the shock absorber replaced, and are all of the air tube connections reconnected?
--
Go to Step 20
--

12
Slowly open the toggle valve on the Pressure Gauge in order to relieve the air pressure.
Replace the left rear shock absorber. Refer to Shock Absorber Replacement in Rear Suspension.
Reconnect all of the air tube connections.
Is the shock absorber replaced, and are all of the air tube connections reconnected?
--
Go to Step 20
--

13
Are any of the air tubes damaged?
--
Go to Step 14
Go to Step 18

14
Replace the air tube that runs from the air dryer to the two rear shock absorbers.

Is the replacement complete?
--
Go to Step 15
--

15
Remove the ALC air dryer from the compressor assembly.
Shake the ALC air dryer with the head connection down.
Did water/moisture come out of the ALC air dryer when the dryer was shaken?
--
Go to Step 16
Go to Step 17

16
Replace the ALC air dryer. Refer to Automatic Level Control Air Dryer Replacement .

Is the replacement complete?
--
Go to Step 17
--

17
Replace the air compressor head. Refer to Automatic Level Control Air Compressor Head Replacement .

Is the replacement complete?
--
Go to Step 18
--

18
Install the ALC compressor on the vehicle.
Reconnect all of the air tube connections.
Is the ALC compressor reinstalled, and are all of the air tube connections reconnected?
--
Go to Step 20
--

19
Repair the air tube-to-air dryer connection leak.

Is the repair complete?
--
Go to Step 20
--

20
Reconnect all of the connectors that were disconnected.
Reconnect all of the components that were removed.
Clear all of the codes with the ignition ON and with the engine OFF.
Wait at least 5 minutes.
Is the rear of the vehicle trim level?
--
System OK
--






Aug 04, 2010 | 1998 Cadillac Catera

1 Answer

Instructions for replacing shocks & struts


Ok first off if the vehicle is equipped with air ride you need to turn the air ride off or you will blow out the rear bags when the rear is off the ground.

For the front Remove the wheel. Take off the upper shock nut. Now remover the two lower retaining nuts. Compress the shock and pull it out. Install in reverse order. Before installing the new shock push the piston completely down and allow it to return. Do this 2 to 3 times.

For the rear remove the wheel support the rear end with jack stands at the jack points. Now use your jack (not a scissor jack) and place it under the rear diff to support the rear diff. If you have another set of jack stands use them and support the rear axle as it sits.

Remove the lower shock bolt. Now remove the two upper shock bolts and the shock will come right out.



Jul 02, 2010 | 1998 Ford Explorer

2 Answers

Lift sensor for rear of 1988 Deville


To begin with, check the "ride level" fuse and make sure that the ride level compressor does work, and you should be able to hear that the ride level compressor is working when the ride level system is leveling the vehicle.

The ride level system uses an air compressor and either an air type of shocks or a type of air billow to raise and lower the vehicle, there is an adjustment to set the ride height and it is located under the vehicle and there is a control lever or rod that should be connected between the rear axle and a switch that is mounted on the body of the vehicle, and there will be an adjustment slot in the control lever between the switch and the body, and that is how you would adjust the ride level height, but be sure that the vehicle can not drop any further down if someone is under the vehicle trying to adjust the ride height.

However, you might find that the control lever to the ride level has fallen off from the switch on the body or it has come loose from the rear axle, and it is just hanging there not operating the switch on the body that controls the the ride level compressor, or there might be a blown out air shock or billow, or you might find that an air line from the compressor is leaking and the ride level compressor will just run continuously until it blows out the fuse, and if that is the case you might also find out that the air compressor has burned out from running continuously.

I hope that this information will help you to solve your ride level problem.

Jun 04, 2010 | 1988 Cadillac Sedan DeVille

1 Answer

2002 linncoln towncar where is the air supension compressor relay switch,please.


Air suspension needs compressed air for the control of Air Springs (Air Spring is a cylinder like thing which goes up and down when air is pumped in and out of it). For pumping in and out the air, air compressor needs to be switched ON/OFF. Compressor relay connects and disconnects the compressor motor from the power supply ( battery). ----------------- air ride suspension compressor located under the air filter box . ---------------- the Air compressor clutch relay location
is fitted to the left hand inner wing (when viewed from the the driving seat).
-------------------
the compresser is located on the left hand side of the car under the hood.
once you open the hood remove the air cleaner housing and windshield washer resivor.
there is a panel that you lift up under both of thoese that is where the compresser is located
-------------
  1. The air suspension uses a small, separate air compressor under the driver's side left fenderwell, with air lines running to the air bags. On the top of each air bag is a electrical valve. This is a relief valve that allows air to be exhausted when activated, and which senses the amount of air pressure within the air bag to keep both sides equal. These valves are operated via a leveling sensor that is attached to the body of the car and to the rear axle by a movable arm. When the rear of the car drops due to increased load, the arm is pushed up. When the arm is pushed up, it turns on the air compressor and fills the air bags to level the car. When the load is removed and the arm moves down, indicating that the back of the car has risen, the sensor opens the valve on the air bags and allows air to escape, lowering the car.
  2. If the back of the car is low, indicating that the air suspension is not working, and the air suspension light is on, check the fuse first. If the fuse is all right, check the air suspension switch in the trunk and make sure it is on. This switch is used when the car is in for service. Always turn off the switch before lifting the car, because the sensor will think the car is rising and keep the air bag valves open, ruining the rear air suspension.
  3. Turn the ignition key with the engine off. Listen for the compressor to come on while pushing down on the rear bumper. If it does not come on, test the switch terminals for power, using a circuit tester. If one terminal has power and the other does not, replace the switch. If there is power, turn the switch to the off position, raise the vehicle and place it on jack stands in the rear. Inspect the leveling switch on the axle, making sure it is not bent and is connected. Use an ohmmeter for this test. Pull the electrical connector off the switch. Loosen the arm of the switch from the axle. Test the switch with the ohmmeter by checking across both terminals while slowly moving the arm. There should be no continuity with the arm down. As the arm is raised, there should be continuity. If not, replace the switch. If there was continuity, connect the arm and the electrical connector.
  4. Put a floor jack under the axle and raise the axle to the point where it is just beginning to lift the car off the jack stand. Turn on the ignition. Turn the air suspension switch to the "on" position. Use the circuit tester to check for power at the leveling switch. If there is power, turn the air suspension switch to "off" and lower the car. Access the air compressor in the front, under the hood, and check the electrical connector for power. If there is power, check for a good ground. If both are good, replace the compressor. If the compressor works and the car does not rise in the back, replace the air bags.


Sep 11, 2009 | 2002 Lincoln Town Car

2 Answers

I just got a 96 Lincoln Continental... the REAR air seems to be fully inflated... jacked up rear end, and very ruff ride. I read that you have to shut the switch off in the trunk, and then manually bleed...


you have to remove the slenoid valve or just the line( to remove push in the orange ring aorund the air line,to hook back just press it in) after the reset the ride control switch and let the car run on a level surface,this will reset the ride control height.

Sep 07, 2009 | 1996 Lincoln Continental

2 Answers

Can any one tell me were how i can find the automatic level control on my 1994 town car


Description and Operation The rear air suspension:
  • Is an air-operated, microprocessor-controlled, suspension system.
  • Replaces the conventional rear coil spring suspension.
  • Provides low spring rates for improved ride and automatic rear load leveling.
  • Is standard equipment on the Town Car.
  • Is available as optional equipment on Crown Victoria and Grand Marquis.
The rear air suspension system has the following features:
  • The system is operational with the ignition switch in the RUN position.
  • Automatic rear load leveling has limited operation for one hour after ignition switch is turned to OFF.
  • The air suspension switch, located on the right side of the luggage compartment, must be turned OFF when the vehicle is on a hoist, being towed or jump started.
  • The Air Suspension warning indicator is located in the instrument panel, to the right of the speedometer.
    • The warning indicator flashes five times and then stays on when service switch is turned off or a system malfunction is detected.
  • The rear leveling system operates by adding or removing air in the springs to maintain the level of the vehicle at a predetermined rear suspension D ride height dimension, and is controlled by a control module (5A919) .
  • The rear air suspension control module also controls the electronic variable orifice (EVO) steering.
  • Refer to Section 11-02 for Description of the EVO steering system.
  • Air required for leveling the vehicle is distributed from the air compressor to the rear air springs by a nylon air line which runs from the compressor air dryer (5346) through a Y-fitting to each individual air spring.


Suspension, Computer Controlled—Town Car

c441c13.gif
Item Part Number Description 1 9C392 Compressor Relay Power Junction Block 2 5A897 Air Line (Attached to Brake/Fuel Bundle) 3 5319 Air Compressor With Regenerative Air Dryer and Vent Solenoid 4 5A897 Air Line to Compressor 5 5K761 Air Suspension Service Switch 6 14489 Data Link Connector 7 — Quick Connect 8 — To LH Air Spring 9 — From Compressor 10 — Y-Fitting (Part of 5A911) 11 — To RH Air Spring 12 5A908 Heat Shield 13 5A966 Spring Retainer Clip 14 5560 Rear Spring 15 5359 RearAir Suspension Height Sensor 16 5A919 Control Module 17 14018 Air Spring Solenoid

Control Module Power and Ground The control module (5A919) has the following features:
  • Power is provided by Circuit 418 and is controlled by the air suspension switch.
    • The air suspension switch is powered through a 15 amp fuse in Circuit 296 in Town Car.
    • AIR SUSPN PUMP (30A MAXI) fuse provides this power through Circuit 414 in the Crown Victoria/Grand Marquis.
  • Control module ground is provided through control module wire harness Pins 6 and 21, to the RH inner quarter panel sheet metal, near the control module .
---------------------------------
Weight Added When weight is added to the vehicle:
  • The air suspension height sensor (5359) length is reduced from trim length, sending a "rear is low" signal to the control module (5A919).
  • The control module then turns the compressor on by grounding the compressor relay control Circuit 420. This restores the rear of the vehicle to trim position.
    • Battery voltage is provided to the relay coil by Circuit 414.
  • The control module opens the spring solenoid valves (5311) by switching Circuits 416 and 429 to ground. This allows pressurized air to enter the springs.
    • Battery voltage is provided to the air spring solenoid valves by Circuit 414.
  • Compressed air flows from the compressor, through the compressor air dryer (5346) airlines and spring solenoid valves into the rear springs (5560).
  • As the rear springs raise the rear body height, the air suspension height sensor increases in length until the preset trim height is reached.
  • The control module then turns off the compressor (through the relay) and closes the air spring solenoid valves.
----------------------------------------------------------------------
Weight Removed When weight is removed:
  • The air suspension height sensor (5359) length is increased from the trim length, sending a "rear is high" signal to the control module (5A919).
  • The control module then opens the vent solenoid valve (located in the compressor assembly) by switching Circuit 421 to ground and opens the solenoid valves (5311) by switching Circuits 416 and 429 to ground. This restores the rear of the vehicle to trim position.
  • Compressed air flows from rear springs (5560), through the air spring solenoid valves, air lines, compressor air dryer (5346), and out the vent solenoid valve.
  • As the body lowers, the air suspension height sensor length decreases until the preset trim height is reached.
  • The control module then closes the vent and solenoid valves.
-----------------------------------------
Control module operates as follows:
  • In general the control module uses a 45-second averaging interval to determine when compress and vent operations are needed.
  • However, door courtesy lamp switch (13713) inputs can override the 45-second averaging interval so compress and vent operations can begin immediately, if needed.
  • The 45-second averaging interval is used to keep the control module from making unneeded corrections.
  • When a vehicle at the correct rear trim height hits a bump, the air suspension height sensor output will read low and high in addition to trim until the oscillations die out.
  • If the control module were to correct for these "bump induced readings", system duty cycle would increase unnecessarily.
  • The 45-second averaging interval not only eliminates corrections due to bumps, but also eliminates unneeded corrections resulting from braking, accelerating, and turning. The control module tabulates the air suspension height sensor readings, and does not begin a compress or vent operation until the air suspension height sensor (5359) reads low or high for 45 seconds consistently.
  • There are more restrictions on vent operations than there are on compress operations.
  • To eliminate the chance of catching a door on a curb as the vehicle vents down, the control module will not allow any venting to occur when a door is open.
  • The control module does not allow any vent operations for the first 45 seconds after the ignition switch (11572) has been turned to RUN.
    • Even if a vehicle is extremely high in the rear, DO NOT expect it to vent until the ignition switch has been turned to RUN for 45 seconds.

Jun 24, 2009 | 1994 Lincoln Town Car

2 Answers

Air ride pump not working 98 towncar


Check your rear air springs see if they have any cracks if so the pump may be burned up since a leak will cause pump to run more thn normal and fry pump if no cracks in air springs the dealer might be the only help, also keep in mind you can replace air spring with regular coil springs (marquis,crown vic) and add some after market air shocks that you can fill with reg air compressor

Jan 21, 2009 | 1998 Lincoln Town Car

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