The 1998 Lincoln Navigator trailer turn signal fuse will be in the fuse box. The trailer turn signal fuse will be one of the auxiliary fuses at the bottom of the second column.
They all have separate circuits, check the fuses.
They should just pull straight out.
check the fuses and the flasher.
You can view the 1999 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 133 , it has the diagrams and lists )
You can view the 1998 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 113 , it has the diagrams and lists )
You can view the 2001 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 159 )
On a 2004 Lincoln Navigator : In the front passenger footwell behind the kick panel You can view the 2004 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 279 )
You can view the 1998 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 113 , it has the diagrams and lists )
You can view the 2000 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 158 , it has the diagrams and lists )
You can view the 2000 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 158 , it has the diagrams and lists )
You can view the 2004 Lincoln Navigator owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 279 , it has the diagram and list )
There are no extra fuses for your trailer lights. If you have the towing package (and you do) the trailer lights run through your regular fuses (tail, brake, turn).