Question about 2004 Lincoln Navigator

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AIR SUSPENSION NOT RISING - 2004 Lincoln Navigator

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Under the hood there is an air compressor to fill the air bags on the suspension. With age the compressor draws excessive amps and blows the fuse. Check the fuse and see if it has popped. If so replace it. If the fuse is good ,locate the compressor and check the electrical plug to it to see if it has become corroded. If corroded pull the fuse and scrub the contacts with a brass brush untill clean. To keep it from corroding in the future apply some dieletric grease to the contacts and plug it back in. hope that helps, Rich.

Posted on Nov 21, 2010

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Lincoln Navigator Air Ride Suspension Kit The Lincoln Navigator Conversion Kit not only avoids defective air suspension system, but also substitutes the familiar suspension components, which wear out of a Lincoln Navigator. This kit incorporates the higher control arms along with ball joints, the outer and inner tie rod ends, sway bar links, and new back shocks.

While eliminating bad air in the suspension system, it offers load leveling capacities too. This kit carries huge load as well as tow trailers. This kit is covered by a lifetime guarantee.

Posted on Dec 20, 2010

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Posted on Jan 02, 2017

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SOURCE: my air ride suspension is not lifting

Hello;
I have run into this before. The compressor is usually the culprit. Make sure you have voltag to the compressor and there are no leaks. If your air bags and / or solenoids are bad then replace as a unit. A bit more money but the last time I bought bags from the dealer they only came with the solenoids.
Thanks and rate me highly;
Rich
RPM Northwest

Posted on Apr 11, 2009

  • 74 Answers

SOURCE: suspension not rising

is the switch in the trunk turned on?

Posted on May 31, 2009

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  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.


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