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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Wont turn off?

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Old Aug 25, 2007 | 08:07 PM
  #1  
Ionlydrivefordtrucks's Avatar
Ionlydrivefordtrucks
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Question Wont turn off?

Hello Ive got a 1988 f150 302 auto that will not shut off when you turn off the key. I have replaced ignition switch and have no idea where to go from there. what could be wrong i have to pull the eec relay to shut off the truck which is geting old so any ideas.

Thank You
Michael
 
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Old Aug 25, 2007 | 10:10 PM
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I know it sounds weird, but try unhooking the alternator, start it and then shut it off and see if it dies.
 
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Old Aug 26, 2007 | 01:17 AM
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maybe the relay= no good? maybe the contacts inside of it are stuck?
 
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Old Aug 26, 2007 | 07:48 AM
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Well ive tried the alternator I unhooked and it just keeps running. Now the relay is new and ford has replaced it four times so I dont know

Michael
 
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Old Aug 26, 2007 | 08:07 AM
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Originally Posted by Ionlydrivefordtrucks
Well ive tried the alternator I unhooked and it just keeps running. Now the relay is new and ford has replaced it four times so I dont know

Michael
The relay has nothing to do with it, when you pull the relay you cut power the EEC and the injectors stop firing and the engine dies.
Pulling the relay will not turn off the power to the ignition system.
So you are keeping power on to both the EEC power relay and the Ignition System. This would have to be the Ignition switch or the adjustment of the Ignition Switch.


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Last edited by subford; Aug 26, 2007 at 08:30 AM.
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Old Aug 26, 2007 | 02:37 PM
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You say you replacrd the ign. switch. Was it the ign./start switch under the dash or the key switch on the column? If it was the the electrical switch under the dash then you possibly need to replace the ign. switch actuator which connects the key switch to the ign. switch.
 
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Old Aug 26, 2007 | 04:26 PM
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okay the actuator did not think of that i replaced the switch under the dash and the key one how whould i check the actuator or do i need a new column.

thank you
michael
 
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Old Aug 26, 2007 | 04:37 PM
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The actuating rod runs down from the key switch along the bottom of the steering column to the switch down near the brake. I could never figure how to get into mine, I paid about 120.00 to have it replaced at the shop, parts and all.
 
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