Question about Ford Mustang

3 Answers

1999 mustang 3.3 auto 2 dr hardtop. alarm light flashes in dash, fuel pump inoperable. fuel injectors inop. turns over won,t start. w Will run by spraying gas in throttle plate injection. I disconnected both batt cables for 10 min and it started up and ran just fine. went to start it and alarm was reactivated. I want to by- pass alarm completely. there is a red wire w/white stripe from door remote/alarm lock in door

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  • danobergie Sep 05, 2009

    Need to permanently disable car alarm-keeps coming back onn even after car starts. no codes

  • danobergie Sep 05, 2009

    yes, it reprograms when disconnecting both batt cables for 10 min and the engine will start and run just fine. i want to disconnect alarm

  • danobergie Sep 05, 2009

    1999 mustang- need to disable alarm

  • danobergie Sep 05, 2009

    Thanks loads for your help. I'd like to just yank the whole thing, but it's probably all too interrelated. Thanks again

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3 Answers

This vehicle has the FORD PATS key based engine disabling system,
and it is currently engaged. The only way to
"reset" the system is at Ford. If left unchecked,
your fuel rail system will lock down until Ford
resets it, so if you can get it to start,
see Ford service for inspection/repair before it
goes bad all together.

It can be disabled using the following module
after that is accomplished, so it NEVER happens
again. Fords are notorious for this part
in the ignition, going out early.

I would suggest the IM-XK04
bypass kit to get around the issue. ($69.95)

This Bypass Module is designed to momentarilly
allow the engine to remote start by sending a proper
coded pulse to open the fuel rail passlock injector
cut off circuit.

The output from an alarm/remote starter
would then shut down the pulse, once it has detected
the engine has engaged, and preserve the integrity
of the PATS system.

That is it's designed purpose.

However, in your case, this input wire on
the IM-XK04 module, instead of going to a
momentary ground pulse from an
alarm/remote starter, would go to a
constant chassis ground, through
the bypass module, grounding out the PATS.
The PATS would always be bypassed as long
as that wire is chassis grounded.

Also, this is a self learning, resistor sensing
and adjusting module. Once the PATS wires have been tapped,
you would press the program button to learn,
and it does.

Please note. This bypass is designed to circumvent PATS
and allow for the remote starting of the engine.
To use this item for simple bypassing, you MUST have 2
original FORD programmed ignition keys for the
module to copy. If you do not have these keys, this
operation will not work. However if you do have the keys,
and can start the car, you would be all set.

Posted on Sep 05, 2009

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  • Ford Master
  • 426 Answers

Im not sure but does your mustang have a thick plastic chip key?

Posted on Sep 05, 2009

  • Donnie Matney
    Donnie Matney Sep 05, 2009

    Im not exactly sure if you can manually disable without the Ford Gem scan tool.If it is a stock alarm and not aftermarket.

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  • Master
  • 1,714 Answers

It would probably make it easier to know what kind of code the computer has stored. Then you could know a little better what direction to go in. The Auto Parts stores can read the codes for you if you can take it in...

Posted on Sep 05, 2009

  • Craig Butler
    Craig Butler Sep 05, 2009

    Go to the alarm module under the hood and pull the fuse. Or unhook +12 volt wire feeding it.

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