2002 Lincoln Navigator Q&A
2002 Lincoln Navigator Question: Suspension compressor will not shut off.
You will need a wiring diagram to see how this is hooked up. Have a technician diagnose it for you. Most likely you have a power line shorted directly to your pump bypassing relays and air suspension fuse. Or you may have a leak in your air suspension lines and air strut continuously running your pump. - TristanReal
AGREE WITH #1 RECHECK YOUR LINES FOR LEAKS FIRST - globalhelper