How do i reset theft system on a 2003 Lincoln navigator

Marvin

• 85242 Answers
• Posted on Dec 01, 2008

SOURCE: HOW TO REMOVE A HEATER CORE IN A 2003 LINCOLN NAVIGATOR

U must remove the entire dash assembly and then the heater core housing which is part of the air distribution box, time to do the job 10-15 hours.

SOURCE: Air suspension pump on 2003 lincoln navigator

the little orange or red ring around the air hose whare it goes in compressor, must be pushed in while pulling out on air line. a small flathead screwdriver works fine

SOURCE: 2003 Lincoln Navigator stumbles/bucking under mild acceleration

I have a 2003 Nav with the exact same problem. I've found it diminishes when taken out of overdrive. Also it's intermittent but more towards bucking. Sorry to post this under solutions.

ZJ Limited

• 17989 Answers
• Posted on Jul 20, 2010

SOURCE: My theft light on my 1998 Lincoln Navigator is on

Deactivating/activating the autolock feature...
Before following the procedure, make sure that the ignition is OFF and all vehicle doors and the liftgate window are closed.
You must complete steps 1-5 within 30 seconds or the procedure will have to be repeated. If the procedure needs to be repeated, you must wait 30 seconds.
1. Turn the ignition key to ON.
2. Press the power door unlock control three times.
3. Turn the ignition key from ON to OFF.
4. Press the power door unlock control three times.
5. Turn the ignition back to ON. The horn will chirp.
6. Press the unlock control, then press the lock control. The horn will
chirp once if autolock was deactivated or twice (one short and one long
chirp) if autolock was activated.
7. Turn the ignition to OFF. The horn will chirp once to confirm the
procedure is complete.

Also, if your vehicle is equipped with a coded-key anti-theft system. Only the correct key will be able to start your vehicle. If your keys are lost or stolen, you must take your vehicle to a Ford/Lincoln-Mercury dealership for re-programming.
Programming additional keys If you need additional keys electronically coded for your vehicle, spares can be purchased (a maximum of 16 keys can be programmed). To program a new key, perform the following procedure:
1. With the coded key in the ignition, turn the ignition from ON to OFF.
2. Within 15 seconds of turning ignition off, insert the new coded key
into the ignition and turn it from OFF to ON or START. If successful, the
THEFT indicator light will illuminate for two seconds. Repeat procedure
for all new keys.
If key coding fails, the THEFT indicator light will flash.
Coding failure can be caused by any of the following:
² The new key was not inserted into the ignition within 15 seconds.
² 16 keys have already been programmed.
² The new key does not have an electronic code.

Other details can find in the 1998-Lincoln-Navigator-Owners-Manual

Good luck (remember comment and rated this).

SOURCE: how to disable or reset

YOU CANT DISABLE OR RESET THE ANTI THEFT SYSTEM. YOU NEED CODE SCAN FIX. PROBLEM WITH ANTI THEFT SYSTEM CAUSED BY KEY ITSELF WORN OUT OR FAULT IN THE ECM IMMOBILIZER READ COIL OR IN THE IGNITION SWITCH BAD.