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Old 07-26-2011, 03:04 PM
Senior Member
Join Date: Mar 2006
Location: Virginia
Vehicle: 2005 Ford F150
Posts: 164
Send a message via Yahoo to MadSkillzRap
Changed ignition switch with new key won't start

Just changed my ignition switch with replacement due to my losing my key in yard. Only one I had damn the luck. Replaced switch but engine won't start. Why? Please help I'm waiting your response.
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Old 07-26-2011, 07:38 PM
Technical Article Contributor
Join Date: Dec 2006
Location: Sask. Canada
Vehicle: 2000 Ford F150
Posts: 1,573
Send a message via MSN to Gotts2BMe
tow to the dealer to get the PATS (antitheft) working again. The truck wont start because it thinks it is being stolen.

2006 Ram 5.9L - 2000 F150 5.4L - 1995 town Car 5.4L - 1995 EGT 1.8L - 1991 ELX 1.8L

Nothing stock
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Old 07-26-2011, 08:15 PM
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Join Date: Aug 2005
Location: DFW
Vehicle: 2003 F-150
Posts: 18,361
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PATS needs to be reprogrammed or disabled

Dual Bullets X Patman LED tail lights X Custom Sub Box
Reverse Fogs X 5/7 Drop X Jmod X Console Shifted
Originally Posted by Raoul View Post
Under my umbrella ella ella ay ay ay
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Old 07-27-2011, 07:54 PM
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Join Date: Mar 2006
Location: Virginia
Vehicle: 2005 Ford F150
Posts: 164
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Thanks for info. So only the dealer can reprogram PATS or disable it. Correct?
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Old 07-27-2011, 08:46 PM
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Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Vehicle: 2001 Ford F250 6.8
Posts: 5,223
They can program it, but they won't disable it.

If you have an "old" key that is currently programmed into PATS, there is a way around it.

Just remove the antenna ring from around the cylinder, zip tie the programmed key to the ring, then stuff the key and ring waaaaay up under the dash. PATS is happy and, if you never tell anyone, you're as secure as any non-PATS vehicle that uses just a mechanical key.

Ah, crap, never mind. I read closer and see you don't have a good key. Call a tow truck or a mobile locksmith who has the right equipment.
If your original owner's manual is missing, download a soft copy from www.fleet.ford.com under the MAINTENANCE tab.

1995 Mustang GT Convertible, only 68K miles.
200 Ford Contour Daily drive.
2001 F250 SD, 6.8L, 4 X4.
2007 Mercury Mariner AWD - Wifey's daily driver
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Old 07-27-2011, 08:46 PM


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