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Question edited for clarity.
Question moved to Lincoln Navigator.
Any DTC Codes?
Did you disconnect the battery lately?
Is the Security Light flashing?
Do you have fuel pressure?
Check for spark?
The most common causes that hinders normal starting operation of your Lincoln Navigator are dead key fob battery, dead 12v battery, corrosion on battery terminals, bad alternator, clogged fuel filter, broken starter, blown fuse, empty gas tank, immobilizer error or any fault in the electrical system.Dec 17, 2020
Your ECM needs to be preprogrammed with the VIN Number. You will need an auto-electrician.
NOTE: We will need your Vehicle Identification Number (VIN) in order to program the unit.
During the checkout process, please enter it in the text field labeled "Vehicle Identification Number (VIN)" located in the Vehicle Information section.
you must be more specific when you turn the key does the engine crank and try to turn over or is there no power at all(this means you turn the key and there is nothing no dash lights nothing)or is there lights but no cranking you see you need to supply more info to help me help you or anybody else
you either have no spark , check spark plugs, or fuel pump isnt working , dont know the year of your lincoln but it could possibly be a fuse for your fuel pump ..
Key ignition key has a chip in the key, if the chip does not match the signature the car is looking for, it will not start - this is an anti-theft feature. The key can be programmed from one of your other keys, or by the dealer.
sounds like antitheft system is acting up..needs reprogramed maybe..pull the negative cable with the key on....kills everything..then shut the key off..reconnect the negative.. turn the key to run position for a few seconds(resets all factory presets) see if it will start..
Items to check:
Try wiring behind alternator.may be full of corrosion.
One of the accessories maybe shorting out and draining battery.
(Techns know how to find this out)
disconnect the battery wait a min then try it this should reset the car.if that's not it let me know what the car is doing when you turn the key example lights dim no sound ,lights don't dim no sound if their is a sound what kind
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