A Lincoln town Car"s waiting suspension provides a small, separate air compressor under the driver’s side left fenderwell, and also air lines run to the waiting bags. On peak of each air bag is a electrical valve the serves together a relief valve that enables air to be worn down when activated. The valve senses the quantity of air pressure within the waiting bag to save both sides equal. This valves room operated via a leveling sensor the is attached to the human body of the car and to the behind axle by a movable arm. As soon as the behind of the automobile drops because of an enhanced load, the eight is pushed up, turning on the air compressor and also filling the waiting bags to level the car. As soon as the fill is removed and the arm moves down, indicating that the ago of the car has risen, the sensor opens the valve on the waiting bags and permits air to escape, lowering the car.

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If the back of the auto is low, indicating that the waiting suspension is no working, and the waiting suspension irradiate is on, examine the fuse. If the fuse is every right, make sure the air-suspension switch in the tribe is on. This move is provided when the auto is in because that service. Constantly turn off the switch before lifting the car, due to the fact that the sensor will certainly think the vehicle is rising and keep the waiting bag valves open, ruining the behind air suspension.


Turn the ignition vital with the engine off, and listen because that the compressor to come on while pushing under on the behind bumper. If it does no come on, test the move terminals for power through a circuit tester. If one terminal has power and also the other does not, change the switch. If there is power, turn the switch to the "Off" position, raise the vehicle and also place it on jack stand in the rear. Check the leveling move on the axle, making certain it is not bent and also is connected. Use an ohmmeter for this test. Traction the electrical connector turn off the switch. Loosen the eight of the switch from the axle. Test the switch v the ohmmeter by checking across both terminals while gradually moving the arm. There have to be no continuity with the arm down. As the arm is raised, there have to be continuity. If not, change the switch. If there to be continuity, affix the arm and the electric connector.

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Put a floor jack under the axle and raise the axle so that is just beginning to elevator the automobile off the jack stand. Revolve on the ignition. Revolve the waiting suspension move to the "On" position. Usage the circuit tester to inspect for power at the leveling switch. If over there is power, turn the air-suspension switch to "Off" and also lower the car. Accessibility the air compressor in the front, under the hood, and check the electrical connector for power. If there is power, check for a an excellent ground. If both are good, change the compressor. If the compressor works and also the vehicle does not rise in the back, replace the waiting bags.


Don Bowman has actually been creating for miscellaneous websites and also several virtual magazines because 2008. He has owned one auto company facility due to the fact that 1982 and has end 45 year of technical suffer as a understand ASE tech. Bowman has actually a organization degree from Pennsylvania State University and was one officer in the U.S. Military (aircraft maintenance officer, pilot, 6 Air Medal awards, two tours Vietnam).