its very likely that the wires vibrated off the connectors under the dash. Try that, it worked for me
Either the fuse is blown, the lighter itself is defective, or the female outlet is bad. Check it with another lighter.
To fix the cigarette lighter on a Chevy Cavalier, check the fuse first. Next check the wiring and the cigarette lighter itself for a problem.
Can be just a blown fuse, so check the fuse. The lighter itself can be defective or the outlet can be bad. Try a known good lighter from another car and see if it works. If so, your lighter is bad. If not, then check the fuse. If the fuse is good you know you have a wiring problem or the outlet is defective and must be replaced.
The cigarette lighter might not be any good. I checked my fuse in mine and it was good and i took the old cigarette lighter out and replaced it and it worked fine. They are like $3-$4 at Wal-Mart.
Check the outlet by plugging in a 12v accessory (radar, gps, phone charger). If it has power, then the problem is the lighter itself. The are only a few dollars.
Check fuse # 17 , that's a 20 amp fuse for the Data Link Connector ( DLC ) and the cigarette lighter
check your fuse for the cig lighter
If a Ford Expedition loses operation of a cigarette lighter, there is a loss of power. Check the fuses and wiring to the lighter to find the problem.
Check fuse, or replace the lighter.
When your cigarette lighter fuse is good and there is voltage measured between the fuse's load side to ground (To check this, use a dc voltmeter or a 12v automotive lamp and an automotive lamp socket. Connect one wire to the fuse and the other wire to the chassis of the vehicle the lamp should glow if voltage is present on the fuse terminal.), check the wire between the fuse and cigarette lighter. This wire should be without cut and when the wire is good then check the connector on the cigarette lighter socket for loose connection or corrosion. One more thing is that, make sure that your cigarette lighter fits the cigarette lighter socket because not all cigarette lighters will work on some cigarette lighter sockets.
Check the fuses
Did you check for a blown fuse?