Yes but not recommended over time.
The 2003 Lincoln Navigator has rear wheel drive.
The 2003 Navigator suspension module is located under the dash on drivers side above the parking brake pedal.
does the 2003 navigator have separate station to put wiper fluid for the rear?
Lincoln Navigator suspension compressor relay switch is located on the firewall. The switch will be on the passenger side of the firewall.
the 2001 is behind the passenger side headlight
50/50. Chance that it will damage something.
There are several O-Rings. fill your info at the bottom page www.starbaja.com
If steering and suspension parts are original they are probably sealed (No Fittings)
NO , there are standard suspension , standard suspension with off road package , and air suspension equipped 2003 Ford Expeditions
possibly the height sensors came unplugged rear or front but that will dissable the pump.
Look in the owners manual or call a dealership in your area.
User manual for Lincoln Navigator (with fuse diagrams and descriptions of purpose for each fuse/relay location) can be found here: http://www.analogstereo.com/lincoln_owners_manual.htm