Where is the rear suspension switch on a 1999 lincoln navigator?

SOURCE: 2001 lincoln navigator rear suspension?

Here is how to tell if system is working.Get into the vehicle and close door. Set ignition switch to on position and move the gear shifter to neutral. After a few secs. you should hear the compressor turn on. If it comes on then put shifter back to park leave ignition on and exit vehicle. Compressor will stop when you open the door but should start back up in a couple of secs. after you close the door. You can then walk around the vehicle and listen for leaks.
If compressor does not come on there are 3 fuses and a solid state relay that controls it along with the module.
The 3 fuses are no. 109(50amp) in the battery junction box under hood.This is the direct feed to compressor thru the solid state relay. The other 2 fuses are located in the interior fuse panel and they are no. 6 (5amp) and no. 12(15amp).
What we usually see though if compressor does not run is either a bad compressor or the solid state relay. They both are rather expensive so I would have an experience tech look at it then.
However If you feel confident enough and have a voltmeter or test light respond back and I will tell you which wires to check.

Marvin

• 85242 Answers
• Posted on Sep 10, 2010

SOURCE: I have a 2001 Lincoln Navigator with Air

1st check fuse #109 50A** Air Suspension Compressor, it is located in the under-hood fuse relay center, the pump relay is on the front passenger side behind the bumper under the head light, water get in these so check for green corrosion in connector, clean as necessary and replace the relay

SOURCE: My rear suspension doesn't work on my 2002 Lincoln Navigator.

can you hear the pump come on when the vehicle starts? Check the rear height sensor at the rear axle it might have come off