This happened to me once. You will need to take it to a dealership the sensor is gone. I don't know the name of the sensor but it maybe on a recall. But mine would not start either, so eventually I had to put the truck in neutral and then start it keeping my foot on the excelerator and then pop into drive. Be careful when doing this it may jerk. And the truck did cut off at intersections so I had to keep my distant for the vehicle in front of me. And do the same thing until I got to the dealership. I ended up paying about $110.00 for them to repalce it. It has worked fine eversince.
You can find the 1999 Ford Expedition headlight fuses in the fuse box. The headlight fuse will be the numbers three fuse.
iin the manual that came with your expedition
where is the fuses for the factory amp in a 1998 ford expedition
Check the headlight switch and make sure you are getting current out of the switch when you turn on the lights.
Check Fuses Check Fuses.
Check your fuses.
Pull the yellow box up to loosen both fuses at once, after this the fuses are only held in by the tabs inside of the yellow 'fuse holder'
Fuses have absolutely no effect whatsoever on the voltage applied to a circuit. Fuses are simply overcurrent protection devices, intended to disconnect the circuit in the event of a sustained overload current or a short-circuit fault current.
See if you are getting power to it - if so bad motorIf not check switch and/or resistor
Check fuses and light bulbs
Check if you're getting fuel. If you're not getting fuel, it's the main relay. If you're not getting spark, it could be the distributer. Also, check your fuses.
Fuses blow when there is a short circuit or an over current condition.
check the fuses
The manual say's fuse 15 and 23 for a 2000 expedition.
Fuses protect against overcurrent (too much current flow), however caused.
All fuses are in the box next to the battery. The airbag fuses are in the yellow holder.
You have a broken wire.
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.
Fuses have a current rating marked somewhere on the fuse body. If this current is exceeded the fuse will blow.