Hi I have a 2006 Lincoln navigator the air suspension pump will not turn on the vehicle dynamics module is not turning on the pump relay because in the pid data the drivers door says it is ajar when it is actually closed,but in another module the vehicle security module the pid data says the door is closed and changes as the door is opened or closed if I am correct if there were a can bus wire problem I wouldn't be able to communicate with either module do you have any ideas

It is shown here

https://www.justanswer.com/ford-lincoln/7jba2-lincoln-navigator-ultimate-air-suspension-relay.html

This image shows what it looks like
.


More info here

https://www.google.com/search?q=2006+Lincoln+Navigator+Active+Air-Ride+suspension+relay+replacement

..

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)

This is a very complicated and expensive system to maintain. I would strongly recommend doing a air suspension conversion on your Navigator and be done with the problem forever.

Lincoln Navigator Air Suspension Conversion 03 06

It's in your owner manual. Year?

SECTION 204-05A: Vehicle Dynamic Suspension - Rear 2002 Expedition/Navigator Workshop Manual
REMOVAL AND INSTALLATION Switch -Air Suspension Removal and Installation

1. Disconnect the battery ground cable. For additional information, refer to Section 414-00 .

1. NOTE: The air suspension switch and bracket is mounted below the RH side of the instrument panel.
   Disconnect the electrical connector and detach the air suspension switch from the bracket.

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.

Vehicle Dynamic Suspension The four wheel air suspension system is comprised of the following components:

• service switch
• control module
• two front height sensors
• one rear height sensor
• compressor and drier assembly (includes vent solenoid)
• air lines
• front and rear air spring and shock absorber assemblies
• four air spring solenoids

-----------------------------------------------------------
Visual Inspection Chart Mechanical Electrical

• Restricted suspension movement
• Excessive vehicle load
• Cut, severed, crimped air line(s)
• Unmounted height sensor(s)
• Damaged front air spring(s)
• Damaged rear air spring(s)

• Battery junction box (BJB) fuses 20 (30A), fuse 27 (5A), and fuse 111 (50A)
• Loose, corroded, or disconnected connectors
• Air suspension service switch is in the OFF position
• Damaged solenoid valve(s)

1. If the inspection reveals an obvious concern that can be readily repaired, correct the concern before continuing with Inspection and Verification.

1. If the concern remains after the inspection, use the scan tool connected to the data link connector (DLC) to retrieve continuous diagnostic trouble codes (DTCs) and to execute On-Demand Self-Test diagnostics for the 4WAS module.
   • If the On-Demand Self-Test is passed and no DTCs are retrieved, GO to Symptom Chart to continue diagnostics.
   • If DTCs are retrieved, go to the 4WAS Module Diagnostic Trouble Code (DTC) Index in this section.
   • If the 4WAS module cannot be accessed by the scan tool, Go To Pinpoint Test A .

------------------------------------------

go to the ford lincoln mercury website and enter you year, make, model of your vehicle. It will let you download a pdf version to your computer. then open the document and go to page 135. this is free don't pay for something you shouldn't, you already got the vehicle. this is just information. Fuse Location,Fuse Amp,Description
1) 25A Audio
2) 5A Clock, Overhead Trip Computer, Electronic
Automatic Temperature Control (EATC),
Powertrain Control Module (PCM), Cluster
3) 20A Cigar Lighter, OBD-II Scan Tool Connector
4) 15A Autolamp Module, Remote Entry Module,
Mirrors, Memory Module, Adjustable
Pedals, Air Suspension Switch
5) 15A AC Clutch Relay, Speed Control Module,
Reverse Lamp, EVO Module, Climate Mode
6 5A Cluster, Overhead Trip Computer, Compass,
Steering Sensor, Brake Shift Interlock
Solenoid, Air Suspension Module, GEM
Module
7 5A Aux A/C Blower Relay, Console Blower
8 5A Radio, Remote Entry Module, Cell Phone,
Clock, GEM Module
9 — Not Used
10 — Not Used
11 30A Front Washer Pump Relay, Wiper Run/Park
Relay, Wiper Hi/LO Relay, Windshield Wiper
Motor, Rear Washer Pump Relay
12 — Not Used
13 20A Stop Lamp Switch (Lamps), Turn/Hazard
Flasher, Speed Control Module
14 15A Rear Wipers, Running Board Lamps,
Battery Saver Relay, Interior Lamp Relay,
Accessory Delay Relay (Power Windows,
Flip Windows, Audio)
15 5A Stop Lamp Switch, (Speed Control, Brake
Shift Interlock, ABS, PCM Module Inputs),
GEM Module
16 20A Headlamps (Hi Beams), Cluster (Hi Beam
Indicator)
17 10A Heated Mirrors/Rear Window Defroster
Indicator
18 5A Instrument Illumination (Dimmer Switch
Power), Clock (Dimmer)
19 — Not Used
20 5A Audio, Four Wheel Air Suspension (4WAS)
Module, Memory Module, GEM Module,
Digital Transmission Range Selector
21 15A Starter Relay, Fuse 20
22 10A Air Bag Module
23 10A Electrochromic Mirror, Aux A/C, Heated
Seats, Trailer Tow Battery Charge,
Turn/Hazard Flasher, Console Blower Door
Actuator
24 10A Climate Mode Switch (Blower Relay),
EATC (via fuse 7), EATC Blower Relay
25 5A 4 Wheel Anti-Lock Brake System (4WABS)
Module
26 10A Right Side Low Beam Headlamp
27 5A Foglamp Relay and Foglamp Indicator
28 10A Left Side Low Beam Headlamp
29 5A Autolamp Module, Transmission Overdrive
Control Switch
30 30A Passive Anti Theft Transceiver, Cluster,
Ignition Coils, Powertrain Control Module
Relay
31 10A Rear Integrated Control Panel (Audio), CD
Player, Cell Phone
Relay 1 — Interior Lamp Relay
Relay 2 — Battery Saver Relay
Relay 3 — Rear Window Defroster Relay
Relay 4 — One Touch Down Window Relay
Relay 5 — ACC Delay Relay

hope this helps.

maybe you got dirt in the line to the rear. Here's some background info:

The air suspension system includes the following major components:

• Air compressor to supply air to the air springs (part of front spring and shock and rear spring and shock absorber assemblies
• Front spring and shock (3C098) and rear spring and shock absorber (5A965) at each corner of the vehicle
• Four linear air suspension height sensors (5359): two rear and two front height sensors to maintain the vehicle at the proper ride height; only LH rear height sensor is used for air suspension.
• Dual-mode front spring and shock and rear shock absorber assemblies with internal actuator.

All system functions are controlled by vehicle dynamics control module (5A919). This control module receives inputs from several different sources. These inputs include:

• vehicle speed via multiplex communication network
• ignition switch position
• door position via multiplex communication network
• height sensor position
• air suspension service switch
• engine rpm via multiplex communication network
• ride and steering personality settings via multiplex communications network

Communications monitor system operation and allow diagnosis of any concerns that may develop in the system.

• System monitoring for the driver's use is provided through the instrument panel mounted message center indicator (10D898).
• Diagnosis communication for the service technician is provided through the data link connector (14489) (DLC) under the instrument panel and Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.

The message center indicator will display AIR LEVELING DISABLED or CHECK RIDE CONTROL if the suspension system is not turned on or the vehicle dynamics control module detects a concern. If air leveling system disabled is displayed, check that air suspension service switch is in the ON position.
-------------------------------------------------------
Weight Added When weight is added to the vehicle, the air suspension system responds as follows:

• Air suspension height sensor length is reduced from trim length, sending a "vehicle is low" signal to the vehicle dynamics control module (5A919).
• To restore vehicle to the trim position, the vehicle dynamics control module turns the compressor on by grounding the compressor relay control Circuit 420 (DB/Y). The relay is ground-side switched.
• To allow pressurized air to enter the rear spring (5560) and front spring and shock (3C098), the control module opens the solenoid valves (5311).
• Compressed air flows from the compressor, through the compressor air drier assembly, air lines and solenoid valves into the air springs.
• As the air springs raise the body height, the air suspension height sensor (5359) increases in length until the preset trim height is reached.
• The vehicle dynamics 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 system responds as follows:
  
• Air suspension height sensor length is increased from the trim length, sending a "vehicle is high" signal to the control module (5A919).
• To restore the vehicle to the trim position, the vehicle dynamics control module opens the vent solenoid valve (located in the compressor assembly) and opens the solenoid valves (5311).
• Compressed air flows from air springs, through the solenoid valves, air lines, compressor air drier (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 vehicle dynamics control module then closes the vent and solenoid valves.

------------------------------------------------------------------------------
Control Module Power and Ground The vehicle dynamics control module (5A919) is located above the upper luggage compartment trim panel and lower module tray. Module power is provided by Circuit 418 (DG/Y) at Pins 36, 37, 56, 57, 58 and is powered through a Fuse 7 (30A) in power distribution box. Module ground is provided through control module wire harness Pins 6, 39, 40 and 60. The data link connector (14489) (DLC) is located in the passenger compartment under the instrument panel, 300 mm (12 inches) right of the steering column. This connector allows communications between the vehicle dynamics control module and either Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent or Rotunda Service Bay Diagnostics System (SBDS)® 001-00001 or equivalent. When the CHECK RIDE CONTROL message is displayed in the message center indicator (10D898), a system error has been detected by the vehicle dynamics control module and is stored in the control module. This diagnostic trouble code (DTC) will be retained for the next 80 ignition switch cycles. If there is no repeat of the same error during these 80 ignition switch cycles, the control module will erase the DTC. Because of this self-erasing memory, a customer may have had a concern "just a few days ago" that is not retrieved from memory when Diagnostic Test Mode (DTC) "Retrieve/Clear Continuous DTCs" is executed. This must be kept in mind if you must tell customer that no current concern has been found. When the vehicle dynamics control module detects a concern, the air suspension system is disabled for the current ignition cycle. If the condition causing the concern clears up during the current ignition switch cycle, the system will not reactivate. For example, if the customer has severely overloaded the luggage compartment, the system will not be able to trim the vehicle without exceeding the compressor run time. This will generate a DTC that disables the computer controlled suspension system. If the customer then drives the vehicle and unloads the luggage compartment without turning the ignition switch OFF, the system will not adjust for the new load. The customer will experience poor ride quality and the vehicle will not adjust trim.

Sounds like a dealer only part. Sorry. There are other routes you can take with these vehicles. you can change out the air bag suspension with regular shocks and struts.

to locate relay on air suspension on 2003 lincoln