Suspension problem
2003 Lincoln Navigator V8 Four Wheel Drive Automatic 68000 miles
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check suspension light came on in my navigator, so i took it to the dealership (like a fool) the manager quoted me $4,300 to replace the front suspension. I can't put my hands on the estimate at this moment so that i can upload it. Ok this is the thing after i got my truck from the dealership the next day all of the air went out of the front suspension... Did they let it out or unplug something? maybe its a fuse or a hose? Please help me to troublshoot. The car was fine before i took it in... I only wanted my problem diagnosied... Please help!
Thank 4 u time
sensationalteacher@yahoo.com

Have you checked that the switch for the suspension is on? It's located in the passenger footwell on the right side. refer to the owners manual for location.