Replaced anti theft plug switch now engine will not crank

Tiny
TERRY L MENESES
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 135 MILES
Before we get started I wanted say thanks for what you guys do for us and thanks for previous work help. I took off anti theft pigtail connector out from ignition to look at something in steering wheel and the anti theft plug switch broke and got new one and now my SUV wont turn over and anti theft light blinks every 5 seconds and saying engine temperature sensor and charge system. I tried everything; new battery and try reset anti theft system etc. Help
Friday, October 2nd, 2020 AT 11:59 AM

5 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Just to be clear, your theft light is blinking once every 5 seconds and when you turn the key to the start/on position it doesn't do anything?

Try putting the key in the ignition and leave it sit in the on position for 30 minutes or the light turns off.

It sounds like you have an active theft system so we need to try and deactivate it.

If this does not work we are most likely going to need to have the OEM or compatible scan tool go through the process to deactivate it. I attached this process.

When you unplug that connector the vehicle thinks someone is trying to steal the vehicle so we need to tell the vehicle that it is not and it will reset.
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Friday, October 2nd, 2020 AT 12:20 PM
Tiny
TERRY L MENESES
  • MEMBER
  • 33 POSTS
Yes, just blinks when I put in key! My other ride is 2005 Lincoln and it blinks until I turn it on and stays red until turn over. So I will try that what you said. Thanks
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Friday, October 2nd, 2020 AT 12:37 PM
Tiny
TERRY L MENESES
  • MEMBER
  • 33 POSTS
I left it in 30 minutes and nothing bud. And I put obd scanner in and saying failed to connect.
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Friday, October 2nd, 2020 AT 1:41 PM
Tiny
TERRY L MENESES
  • MEMBER
  • 33 POSTS
Thanks. Got lucky and was a fuse 28 PCM ! It works now.
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Friday, October 2nd, 2020 AT 6:28 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Haha. That was exactly where we were going next with the scanner not communicating. Great catch and I am glad you figured it out. Thanks for the information and please come back net time you need some help.
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Friday, October 2nd, 2020 AT 6:52 PM

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