If it is just one seat then I would start to make sure that the connector hasn't come apart some how. If it hasn't then the motor will probably have to be relaced. If all power seats don't work then check the fuse. You should be able to find it in the owners manual. Hope this helps.
how you find a air suspension relay in a Lincoln navigator
The 2003 Lincoln Navigator is 6 ft. 8.2 in. (80.2 in.)1 one-touch power windows wide.
The 2001 Lincoln Navigator is 6 ft. 7.9 in. (79.9 in.)1 one-touch power windows wide.
The 2002 Lincoln Navigator is 6 ft. 7.8 in. (79.8 in.)1 one-touch power windows wide.
The 2004 Lincoln Navigator is 6 ft. 8.2 in. (80.2 in.)1 one-touch power windows wide.
The 2005 Lincoln Navigator is 6 ft. 6.7 in. (78.7 in.)1 one-touch power windows wide.
The 2006 Lincoln Navigator is 6 ft. 6.7 in. (78.7 in.)1 one-touch power windows wide.
300 horsepower
On a 2004 Lincoln Navigator : NO , the passenger compartment fuse panel / Power Distribution Box is combined in the front passenger footwell , behind the kick panel
First you have to determine the cause before you can repair anything. It could be a blown fuse, bad circuit breaker, bad wiring, bad regulator, bad motor or a bad switch.
On a 2004 Lincoln Navigator : ( NO , the passenger compartment fuse panel and the power distribution box are combined behind the kick panel in the front passenger footwell )
were is the fuse for driver power window 2001 lincoln town car