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trouble code C1979

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Old Nov 14, 2012 | 06:48 PM
  #1  
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beckman
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trouble code C1979

hi guys i have a 2007 ford f150 and the 4wd will not engage at all checked vacum lines they all look intact wondering if it could be the IWE solenoid and is there any way to test the IWE solenoid thank you
 
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Old Nov 16, 2012 | 08:42 PM
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Originally Posted by beckman
hi guys i have a 2007 ford f150 and the 4wd will not engage at all checked vacum lines they all look intact wondering if it could be the IWE solenoid and is there any way to test the IWE solenoid thank you

Hello, this might be of some help to you or it may not.

Turn the radio off and start the engine.The cab should be quiet, then turn the 4wd **** to 4wd- the solenoid should make a faint "click" noise to determine if its working or not and the instrument panel "4x4" light should come on. The physical solenoid is located on the passenger side under the hood near the firewall.almost in the upper left hand portion when opening the hood.

Hope this helps.
 
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Old Nov 16, 2012 | 10:12 PM
  #3  
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solenoid

hi it does make a sound when i turn the **** but the sound is coming from the side of the transfer case and not from the solenoid on the firewall and the light doesnt come on in the dash but if you turn it quick enough back and forth it flickers
 
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Old Nov 16, 2012 | 11:14 PM
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Originally Posted by beckman
hi it does make a sound when i turn the **** but the sound is coming from the side of the transfer case and not from the solenoid on the firewall and the light doesnt come on in the dash but if you turn it quick enough back and forth it flickers

If the solenoid clicks that's a good sign..it may be the vacuum line not making connection since it sounds like the solenoid is OK. Try this- lightly tap on the actuator motor attached to the transfer case, if you don't use the 4wd much the motor gets stuck, a small hammer can do the trick.<!-- google_ad_section_end -->

Sorry man.
 
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Old Nov 17, 2012 | 09:51 AM
  #5  
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solenoid ?

there is a vacum line on the drivers side front that is open but it looks like its from the factory open like that
 
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Old Nov 18, 2012 | 03:36 PM
  #6  
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Originally Posted by beckman
there is a vacum line on the drivers side front that is open but it looks like its from the factory open like that

You could check the other side to see if the passenger side is the same. The idea is that when you flip that switch to 4wd Hi the vacuum line releases its vaccum on the line to give you 4wd. I'm not sure anything should be "open" or not. Sounds like the system should be sealed to prevent debris from entering the system. I'm no expert by any means. I wish I could be of more help to you.

Hope you get this figured out.
 
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