There can be several reasons. The system will not activate unless all the door switches and the trunk switch indicate everything is closed. There are some fuses and Relays for the pump motor that can be checked. There is a cutoff switch in the trunk which is shut off for tire service and other things requiring lifting the vehicle.
Some of the better scanners can check the Air-lift system systems. You can call Autozone, Advance, or Oreilys to see if they have the better scanner to do this. Usually free at these brands.
I recommend doing a How Where To Leak Test Ford or Lincoln Air Suspension System described on this website. To save a ton of cash and time, you could do a Lincoln Mark VII Air Suspension Conversions
How Where To Leak Test Ford or Lincoln Air Suspension...
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Lincoln Mark VII Air Suspension Conversions
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SOURCE: Dashboard removal, 1988 LINCOLN, MARK VII
If you have never done this before, you really need to go get a Haynes or Chilton manual for this. They run about $25.00 and have step by step plus pictures. I've done one in my carreer and will never do another. And it was for my son. Believe me, it's a task I don't wish on anyone.
Go check out a manual. Google "Haynes Repair Manuals". It's worth it.
SOURCE: 1990 Lincoln Mark VII, compressor turns on, air
before you buy a new compressor. replace the 4 small O-ring in the top of the dryer.
SOURCE: 1991 Lincoln Mark VII LSC spark plugs and wires
you don't have to worry about a special tool if you are replacing the wires but you will need a 5/8 socket with a rubber boot and an extension and maybe a swival to remove the plugs if there is an auto zone near by they will print you out a diagram for free
SOURCE: Can I put a Ford 460 engine into my 1988 Lincoln Mark VII?
Technically it will fit, if you dont like having a hood. But again. Stick with the trusty 302, Toss a Novi 1000 on it, and enjoy.
SOURCE: i need a diagram on
There's not really a diagram for the
actual removal and installation. A good repair manual might list
steps like these: First, your system needs to be purged of the
freon. Next, unplug the AC clutch/pulley assembly at the front of the
compressor. Remove the belt, then the AC lines on the compressor
(usually in the back), then unbolt the AC from any mounting
bracket(s) and remove. To avoid having to press on and off the
clutch/pulley assembly you might want to make sure you're buying a
complete compressor assembly. Read and follow those directions
concerning oil for the compressor. After installing the new AC,
reconnect the lines with new "O" rings. Most if not all
compressor manufacturers will not honor any warranty unless you
change out your orifice tube (also called an expansion valve) and
accumulator (aka the dryer) at the same time. Recharge the system
with the appropriate amount and type of freon, most likely R-134a.
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