On a 1998 Lincoln Navigator I believe it is in the front passenger footwell ( it might be behind an access panel )
The 1998 Lincoln Navigator windshield wiper fuse is located in the fuse box. The windshield wiper fuse will be in the second column, third from the top.
According to the 1998 Lincoln Navigator Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-30 )
firewall 4 - 8 3 - 7 2 -6 1 - 5 front of Lincoln Navigator
Behind the bumper and fog light on the driver's side
where is the ecu located on 1998 lincoln towncar signature series 4.6 liter
5W-30 ( according to the 1998 Lincoln Navigator Owner Guide )
On a 1998 Lincoln Navigator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
Speed Sensor The sensor is located on the rear axle housing.
According to the 1998 Lincoln Navigator Owner Guide : ( " regular " unleaded , 87 octane gasoline is used )
On a 1998 Lincoln Navigator : The ELECTRIC fuel pump is INSIDE the fuel tank ( it goes in from the top side of the tank )
You can view the 1998 Lincoln Navigator Owner Guide online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides