Your fuse is probably blown. Go buy a pack of new fuses for like $5 dollars.
On the 2003 Ford Explorer - 4 door - in the fuse panel located under the instrument panel on the drivers side , fuse # 24 is a 15 amp fuse for the cigar lighter , OBD II
In the fuse panel on the driver's end of the dash (visible with driver's door open) in location # 17 is a 20 amp fuse for the cigar lighter/ OBD II.
Check this website: http://www.focusplanet.com/downloads/focusmanuals/2003/2003_focus_owner_guidemanual.pdf
it should be in the fusebox, look in your owners manual if you have it.
Cigarettes lighter
fuse # 17 is a 20 amp fuse for the cigar lighter , Data Link Connector ( DLC )
# 41 / 20 amp mini fuse / cigar lighter , OBD II diagnostic connector
In a 2003 Daewoo Matiz, the fuse for the radio and cigar lighter can typically be found in the fuse box located under the dashboard on the driver's side. You may need to remove a cover to access it. Refer to the owner's manual for the specific fuse diagram, which will indicate the exact fuse numbers for the radio and cigar lighter. Always ensure the vehicle is turned off before checking or replacing any fuses.
To replace the cigar lighter in your 2003 Honda Civic Si, first, carefully pry off the surrounding trim or panel using a flathead screwdriver or trim removal tool to avoid damage. Disconnect the electrical connector from the back of the lighter by pressing the tab and pulling it out. Replace the old lighter with a new one by connecting it to the electrical harness and securing it back in place. Finally, reattach the trim or panel to complete the installation.
On a 2003 Ford Explorer Sport Trac : ( fuse # 17 is a 20 amp fuse for the cigarette lighter and OBD II ) * open the drivers door , and IN the drivers end of the dash you will see a removable plastic fuse panel cover
The lighter fuse for a 2003 Buick Rendezvous is typically located in the underhood fuse box. To access it, open the hood and look for the fuse box, which is usually positioned near the battery. The specific fuse for the lighter is often labeled as "CIG" or "Cigar," so refer to the diagram on the fuse box cover for exact identification. If the fuse is blown, replacing it should restore functionality to the lighter.
The owners manual list fuse numbers: 1. Power Outlet (Front) 16. Power Outlet (Rear) 31. Cigar Lighter