Question about 2004 Ford F150

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03 f150 will not start(security light flashing). Turn switch on, wait to see if light flashes, if light stays on truck will start. May start twice then back to switch off & on check for flashing. Can I DISABLE the security system to be able to use the truck for work untill I can get it fixed? Can I fix it at home?

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There is no way to disable the immobilizer ( that would defeat the purpose of it ), the question I have, do you have another RFID tag on the ring with the truck key ( speed pass, another Ford key, etc ) ?

If you have these on the same ring, and they are too close to the key cylinder, it can cause a false negative for the programmed keys.

Have you tried another key ?

Are there any other modifications to the truck ( remote start, or security system ) ?

Posted on Apr 11, 2011

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Posted on Jan 02, 2017

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Reset security code 2003 Chevy impaula


Instructions
    • 1 Attempt to start the car. If it does not start, or dies very quickly after it started, then leave the key in the ignition in the "ON" position and wait 10 minutes. Make sure the security light is flashing. After 10 minutes the security light will stop flashing and either turn off or stay on steadily. When it does, then turn the ignition off, wait 20 seconds and attempt to restart the car.
    • 2 Repeat this procedure three times in quick succession without removing the key from the ignition.
    • 3 Start the car following the third 10-minute waiting period. The car should start and stay on. If it stays running, then the codes have been relearned and the problem is solved. If the car still does not start then you may need to have all or part of the passlock system replaced

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You need to relearn the passlock system (security). There are 2 ways. One is with a scanner, which most diy'er wont own an expensive one to do it this way, here is the manual way. Start the truck and let it run until it dies. The security light should then be flashing. Leave the key in the run position until the security light stops flashing (about 10-15mins). After the light stops flashing turn the key off. Try to start the truck again. It should do the same thing (run for a few seconds and then die with the security light flashing). Again wait for 10-15 mins for the light to stop flashing and then turn the key off and repeat the process one last time. That's a total of 3 times. Once you finish the process the 3rd time. Let the truck sit for a minute with the key off. It should now be programmed and start and run normally.

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Is the security light flashing? If so, turn ignition on and wait for 10 minutes and light should stay on solid. Then try and start the car without turning the ignition back off. Then turn off ignition and wait 1 minute. Then turn ignition on and see if security light is flashing. If not try and start your car. If it is flashing, try waiting again with just the ignition on and see if it goes out.

Nov 24, 2012 | Cars & Trucks

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I have a 200 saturn and every once in a while it won't turn over...battery fine and no engine light


If it is an automatic shift you should have a neutral safety switch between the key switch and the starter. I would check that and for power at the starter when it fails to crank.
If it is a manual shift there is a switch on the clutch pedal or linkage.
It may be tough to find until you can duplicate the problem on demand.
Could also be a dead spot in the starter or solenoid.

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03 grand am 3.4l no crank at all. All the light on dash work good fuel pressure starter spins and engine starts and then stalls when jumping the starter directly installed new pass lock switch and...


If the Passlock switch has been replaced, the computer has to "learn" the new Passlock code. You will need to hook up a battery charger to perform the learning process. (It takes about 30 minutes with the key in the "ON" position and it will run the battery down.)

Step 1:

Turn the key to the "START" position and release to the "RUN" position. The "SECURITY" light will be flashing. After about 10 minutes, the light will stop flashing.
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Step 2:

Turn the key "OFF" then back to the "RUN" position. (Do NOT try to crank it yet) The light will start flashing again. Wait about 10 minutes for it to stop flashing.
.
Step 3:
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Turn the key "OFF" and back to "RUN" one last time. The light will be flashing again. This time, when it stops flashing, do not turn the ignition off. Instead, turn the key from the "RUN" position to "START". The engine should start and run. The computer has now learned the new Passlock code.

Please help myself and others by taking the time to rate my answer. Thank yoou for using fixya!

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Why wont my car start even after i tried the security reset. i turned key to on position for 10 minutes turned it off then tried to start it 3 times. security light still flashes


turn the key on and wait till the security light stops flashing ( this could take as long as 30 minuets ) then turn the key off then back on but do not try to start the engine and wait till the security light stops flashing ( again this could take as long as 30 minuets ) then turn key off then turn key on and start engine.

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Gm downfall, It needs repair to the passive theft system

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Here is what you do, but only when the SECURITY light flashes - if it is always ON or OFF it's no use.
Turn the key in the ignition to ON.
Wait for exactly 10 minutes ( SECURITY light will flash for 10 minutes and then stay on SOLID)
Turn the key to OFF
Wait 5 seconds.
Turn the key in the ignition to ON.
Wait for exactly 10 minutes.
Turn the key to OFF
Wait 5 seconds.
Turn the key in the ignition to ON.
Wait for exactly 10 minutes.
Turn the ignition OFF.

Start the car normally.
It has relearnt the keycode and you're good to go.
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Good luck.

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Everything you need to know is on this link

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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