Question about 2004 Lincoln Navigator

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On 2004 lincoln navigator. i can manually operate compressor and raise all 4 airbags only invidually. i replaced the compressor relay and there are no leaks throught. i checked the self leveling with ohm meter and it seems to be working. i can manually purgh air out of each airbag, after filling up all airbags with air, leaving it overnight, rear end of the vehicle stays up, front drops about an inch. I believe there is a miscommunication between the computer and the compressor because the compressor is not coming on when the airbags are deflated, also message board reads check air suspension. i also replaced the airlines from compressor to airbags due to leaks in leaky old rings at the connectors. i dont know what else to do. HELP!!!

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  • youvi2 Feb 04, 2010

    i have replaced the airbags.

  • youvi2 Feb 04, 2010

    i have replaced the airbags

  • youvi2 Feb 04, 2010

    on 2004 lincoln navigator. i can manually operate compressor and raise all 4 airbags only invidually. i replaced the compressor relay and there are no leaks throught. i checked the self leveling with ohm meter and it seems to be working. i can manually purgh air out of each airbag, after filling up all airbags with air, leaving it overnight, rear end of the vehicle stays up, front drops about an inch. I believe there is a miscommunication between the computer and the compressor because the compressor is not coming on when the airbags are deflated, also message board reads check air suspension. i also replaced the airlines from compressor to airbags due to leaks in leaky old rings at the connectors. i dont know what else to do. HELP!!! I have replaced the airbags and leaking is not the problem.

  • youvi2 Feb 05, 2010

    where/how do i get the codes?

  • youvi2 Feb 05, 2010

    how do i check the sensors?

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  • Lincoln Expert
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Hello! You have a defective Front Suspension Height Sensor (FSHS).

Sensor is located behind the left front ball joint assembly. Two nuts hold it in place. There is a sensor arm connected to the FSHS. As suspension raises or lowers the suspension arm causes the sensor to change resistance (its a potentiometer). This change in resistance, in turn, signals the air bags to lower or raise the vehicle to the correct height.

CAUTION...Make sure the air suspension is turned off before working on the system.

Shift vehicle to neutral...Lift vehicle...disconnect sensor control arm...remove sensor connector...remove sensor...

Test with an ohmmeter...Resistance should change smoothly...

Tighten to 17 ft/lbs.

Guru.......saailer


Posted on Feb 05, 2010

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Did you check the heigth sensor as well? That keeps the leveling maintained

Posted on Feb 05, 2010

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Based on this year truck you should have a code stored to pinpoint what test needs to be performed. Once you have a direction to go then it'l be easier to tell if you have a computer issue or a circuitry issue.

Posted on Feb 04, 2010

  • Susan Price Feb 05, 2010

    The only way to get the codes is with a scanner from a repair shop. You local auto parts store may be able to get them for free but not everyone has a scanner that can access the air suspension. No use worrying about what to test untill we find out what the code is going to tell you test.

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Hi based on my 30 years of working on Ford (I am a Ford dealer tech factory trained on this system) air ride suspension the only thing that cuases this drop is leaking airbags, they leak very, very slowly at the crackes that form in the creases of the bag, the whole system is very expensive to keep up after it reaches near 100,000 miles as that is the life span of any airbag spring, the fronts go 1st as u have found out, my best advice to u is replace the air ride system with a conversion kit to conventional strut/shock suspension, believe me you will thank me, the cost to do the front airbags is about $1000.00. go to the link for information and ordering of a kit to replace the system.

http://www.suncoreindustries.com/english-lincoln-navigator-03-06-air-suspension.html

Posted on Feb 04, 2010

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