GM of Ford, makes no difference , see if the compressor is running when you turn the key on , can you hear it run ?
If it is running , there may be a leak in a hose , not letting the suspension raise , or a leaking seal on the actual shock.
Rear suspension compressors do tend to fail on older cars , some are under the rear of the car , some are under the hood , usually on top of the inner fender .
The air suspension switch is behind an access panel , in the cargo area , on the drivers side near the liftgate ( the fuel pump inertia / shut off switch is also there )
Lincoln Navigator suspension compressor relay switch is located on the firewall. The switch will be on the passenger side of the firewall.
On a 2002 Ford Expedition : In the power distribution box ( which is " live " ) located in the drivers side of the engine compartment : ( maxi fuse 109 is a 50 amp fuse for the air suspension compressor ) ------------------------------------------------------------------------------------------------- Also , in the fuse panel below and to the left of the steering wheel , by the brake pedal ( # 12 is a 15 amp fuse for the air suspension switch ) ( # 20 is a 5 amp fuse for the air suspension module , audio , GEM module , and memory module )
turn switch off and on
If it has air suspension there will be a shut off switch for the air suspension The switch is located behind ( 2 ) access panels that are in the cargo area , on the driver's side , by the liftgate
In the front passenger footwell by the kick panel you will see an off / on toggle switch for the air suspension from the factory
mine is a 98 and the switch is located under dash on passenger side on the side kick plate.
The switch can be found under the dash on the passenger side of the vehicle, closest to the door.
there are several causes to the air pump. the first and most obvious is the air pump (compressor) itself. if you do not hear the compressor pumping air or if you do not feel the slight vibration of the compressor when you put your car into drive, then it's probably the compressor that has gone bad. if the compressor is coming on and you do not hear any air leaking, then your problem could be the height adjuster, located on the suspension bags themselves. Bronconvict: another possibility includes the compressor relay switch. This switch controlls the power to the air bag suspension compressor. This switch is known for burning out when the suspension compressor is working too hard. This can also be caused by a bad/corroded GEM module (due to notorious winshield leak). i had to replace "height sensor" on driver side . part was $200.
The air suspension relay on a 2003 navigator is located on the passenger side where the compressor is on the front bottom near the fog lights.
It is actually an air suspension consisting of an electric air compressor, 4 air springs, 3 height sensors,an on/off switch and a suspension computer.You need to diagnose where problem lies before you can fix it. Is switch in trunk behind spare turned on ? Does compressor run when key is turned on?Hope this helps.
air suspension switch in trunk. compressor under hood