1997 Ford F150 Regular Cab Logo

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Posted on Apr 10, 2009
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Replaced the alternator, now anti theft won't disable

Alarm sounds, dash lights blink, key turns in ignition but will not start. Acts like there is a kill switch preventing the truck from starting. Do not have alarm remote.

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gerry bissi

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  • Ford Master 4,390 Answers
  • Posted on Apr 15, 2009
gerry bissi
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Joined: Jan 07, 2009
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The ignition lock anti-theft switch (19A438) detects if the ignition key cylinder is broken or "slam pulled" during a theft. The ignition lock anti-theft switch is always monitored by the remote anti-theft personality (RAP) module. This allows the alarm system to be triggered in the case that the ignition lock anti-theft switch detects tampering of the ignition key cylinder (even in the event that the alarm is not active at the time).
Refer to the Section 501-14B for more details on the keyless entry remote transmitter (15K601).
The door open warning lamp switch (14018) communicates to the RAP module through the generic electronic module (GEM). This input to the RAP will cause the anti-theft alarm to be sounded if the anti-theft alarm was armed.
The door disarm switches are assembled into both LH and RH lock sets. The door disarm switch must be triggered before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating when it should have been disarmed.
The RAP module controls the anti-theft system and is the brains of the keyless entry system. The RAP module communicates with the GEM to request that the interior lights be turned ON/OFF with use of the keyless entry remote transmitter, and the GEM communicates to the RAP to inform when the door is opened. Refer to Section 418-00 for inter-module communication.
The RAP module has three wire connectors attached to it:

  • The antenna for the keyless entry remote transmitter.
  • 26 circuit connector (C256).
  • 22 circuit connector (C257).
In addition to the perimeter alarm that uses the door open warning lamp switch, the RAP module also uses the ignition lock anti-theft switch and the autolock/relock feature to prevent theft of the vehicle. For a full description of the autolock/relock system, refer to Section 501-14B .
The THEFT LED is found on the instrument panel between the tachometer scale and the needle pivot point. The LED is illuminated during prearming and flashes when armed or triggered.
Prearming and Arming the System
The system can be armed if:
  • The ignition is OFF.
  • The PANIC alarm is OFF.
  • All doors are closed.
There are two ways to prearm the system:
  • Press the LOCK button on the transmitter.
  • Open a door, press the power door lock button and close the door.
After 30 seconds the system will be armed and the theft indicator in the cluster will flash every two seconds.
Disarming an Untriggered System
An armed system will be disarmed with one of these valid actions:
  1. Pressing the UNLOCK button on the transmitter.
  1. Placing a key in the door and turning to UNLOCK.
  1. Turning the key to RUN or ACC.
The anti-theft alarm can be triggered by the following conditions:
  • The ignition cylinder is damaged with or without the RAP being armed.
  • A door is opened without disarming the armed RAP module.
The remote transmitter can activate a panic alarm which is similar to an anti-theft alarm, but does not deactivate the starter or cause the theft indicator to flash.
Disarming a Triggered System
If the system has been triggered, (the horn honks, the lights flash, and an external starter interrupt relay is engaged), the system can be disarmed by:
  1. Pressing the UNLOCK or PANIC button on the transmitter.
  1. Putting a key in the door and unlocking the door.
  1. Turning the ignition to RUN/ACC (Turning the key to RUN/ACC will not disarm an alarm that has been triggered by the ignition lock anti-theft switch.).

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Feb 28, 2009

SOURCE: Isuzu Trooper anti-theft alarm

i put a new stereo in my 1998 isuzu trooper now the anti theft wont let car start what do i do

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Anonymous

  • 82 Answers
  • Posted on Jul 16, 2010

SOURCE: isuzu rodeo 2000, LS, anti-theft alarm needs to be reset

This has to do with the Auto's Computer system and should ONLY be done by a Factory Rep who knows what he/she are doing. not a home mechanic chore!!

ginko

Ginko

  • 19396 Answers
  • Posted on Aug 09, 2008

SOURCE: 1999 toyota camry anti theft

Try unplugging battery contact for two minutes.

Anonymous

  • 1 Answer
  • Posted on Mar 20, 2009

SOURCE: 1997 ES 300 How to reset anti-theft system when car won't start

With the doors shut, insert the key into the drivers door lock. Lock and unlock the door 5 times. This should reset the system. If that doesn't work you should contact a qualified repair shop.

Anonymous

  • 6 Answers
  • Posted on Feb 15, 2010

SOURCE: How to disable/reset anti theft system on a 98 Cavalier z24

there is a button under the steering wheel to the right. Push it, and it will alternate between "on" and "off" mode. try starting it after doing that.

If your problem isn't from accidentally having that button engaged you could have faulty wiring in the anti-theft system, and you should definately get that looked at. It could leave you stranded one day.

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0helpful
1answer

My anti-theft system came on and my key wouldn't come out but it would start and my windows don't roll down and my sunroof doesn't open does that have to do with the anti-theft system

When the anti-theft system in your car is activated, it is designed to prevent unauthorized access to the vehicle and protect it from theft. The specific features and functions affected by the activation of the anti-theft system can vary depending on the make and model of your car. However, here are some common ways in which the anti-theft system can impact your vehicle:

  1. Ignition Interlock: In many vehicles, the anti-theft system can prevent the engine from starting or cut off power to the ignition system. This is often the primary function of the anti-theft system to deter thieves from driving the vehicle.
  2. Key Removal: Some anti-theft systems can also lock the key in the ignition switch, making it difficult or impossible to remove the key when the system is activated.
  3. Door Locks: The anti-theft system may lock or unlock the doors automatically when it is activated. This can be intended to prevent unauthorized entry.
  4. Windows and Sunroof: In some cases, the anti-theft system can disable the power windows and sunroof to prevent someone from gaining access to the interior through these openings.
  5. Alarm Activation: If your vehicle is equipped with a security alarm system as part of the anti-theft system, it may activate the alarm if unauthorized entry is detected or if someone tries to tamper with the vehicle.
  6. Vehicle Immobilization: Some advanced anti-theft systems can immobilize the vehicle by cutting off fuel or electrical power to the engine.
If you're experiencing issues with your key not coming out, windows not rolling down, and the sunroof not opening, it's possible that these problems are related to the activation or malfunction of the anti-theft system. However, it's essential to consult your vehicle's owner's manual or contact the manufacturer or a qualified automotive technician for specific information about how your vehicle's anti-theft system operates and to diagnose and resolve the issues you're facing.

In many cases, anti-theft system problems may require specialized equipment and knowledge to diagnose and repair, so seeking professional assistance is often the best course of action.
0helpful
1answer

How do you reset the anti-lock system in a 2015 ford explorer

Press the unlock button on your vehicle's key fob to deactivate the alarm.

If you've misplaced your remote for the car, use the PATS programmed key to unlock the driver's side door.

Then, put the key in the ignition and turn the key to the "on" position. The vehicle's battery should be on, but the engine shouldn't be running.

Locate the override button on the alarm box, beneath the driver's side of the dashboard.

Press the button and hold it in until the alarm beeps one time. The LED light for the alarm should stop blinking, indicating the anti-theft system is disabled.

To reset the vehicle's alarm, put the PATS programmed key in the ignition and turn the key to the "on" position. Press the override button.

When the alarm resets, it chirps two times and the LED light begins blinking.
0helpful
1answer

99 explorer alarm disables. Motor dies

Anti-theft system can keep vehicle from starting , Alarm is for vehicle content theft , open door without key alarm sounds (horns) ! PATS - passive anti theft system PATS enables and disables the engine from starting ,it will not cause the engine to die ! You have some other kind of problem ! If the vehicle engine doesn't turn over an red light on top of dash flashes fast ,then you have anti-theft system problem !
PATS differs from the perimeter anti-theft system in that PATS enables and disables the engine from starting. If equipped, the perimeter anti-theft system protects the perimeter of the vehicle (doors, hood and trunk) and sounds an alarm.
0helpful
2answers

Anti theft wont let me start car

The problem may not be with anti-theft but with a bad fuel pump,cam/crank sensor etc. Also, you may try unlocking the drivers door with the key. On most cars that is the standard method for disabling the security system.
6helpful
3answers

How do I disarm anti theft device on a 2001 ford taurus

SEE THE STEPS WITH CAREFULLY AND COMMON SENSE:God bless you
Press the unlock button on your vehicle's key fob to deactivate the alarm. If you've misplaced your remote for the car, use the PATS programmed key to unlock the driver's side door. Then, put the key in the ignition and turn the key to the "on" position. The vehicle's battery should be on, but the engine shouldn't be running.

  • 2 Locate the override button on the alarm box, beneath the driver's side of the dashboard. Press the button and hold it in until the alarm beeps one time. The LED light for the alarm should stop blinking, indicating the anti-theft system is disabled.

  • 3 To reset the vehicle's alarm, put the PATS programmed key in the ignition and turn the key to the "on" position. Press the override button. When the alarm resets, it chirps two times and the LED light begins blinking.



  • 7_25_2012_6_49_12_pm.gif
    1helpful
    2answers

    When you put the key in and you turn it over all the power comes on but won't turn over, is that a starter problem or an alternator problem?

    If you have power it would not be an alternator problem unless its not charging the battery and the battery is dead or too weak to turn the starter.
    You may have a VATS (Vehicle Anti Theft System) Pass KeyII at fault. Is there a Security light on in the dash?
    You may want to start by testing the small wire (S Terminal) at the starter. Hook a test light to it and turn the key to start. If the light comes on then its a bad starter/solenoid. No light then its the ignition switch, any anti theft device (if you have an alarm that disables or is in any way connected to the starting system i.e. remote start, that could very well be the problem) or wiring.
    3helpful
    2answers

    ANTI THEFT LIGHT KEEPS FLASHING ON AND OFF

    Did you steal it? I heard about you thieves who steal cars then put new transmissions in!!
    Seriously, try this, it may help...
    Put the key in the ignition, and turn forward all the way just before cranking. Then within 5 seconds, locate, press and hold in the valet/overide button, found under the dash area, (push button, spring loaded) until the installed LED (the blinking light) in your dash area goes on solid, and the siren chirps once. (Your valet switch might be the toggle (on/off) type. in this case, key on, flip switch in opposite direction, then turn the key off.) This should reset the alarm, and reset the grounded relay on the starter wire, allowing you to start the engine. At this point, the only thing working would be the keyless entry from the alarm, if it came equipped that way. Just Repeat these steps to place it back to usable armed mode. You may get 2 chirps, confirming it, and the lights may flash twice as well. That should do it. Check out www.explorerforum.com

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