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2002 F150 5.4L 4x4 won't engage

1997 - 2003 F-150

2002 F150 5.4L 4x4 won't engage

  #1  
Old 07-11-2018, 11:04 AM
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Join Date: Jul 2018
Posts: 2
2002 F150 5.4L 4x4 won't engage

2002 F150 5.4L 4x4, light on dash indicates it is in 4H or 4L, but it is not actually in 4WD, still only in 2H, could it be a vacuum line or the 4x4 actuator?
 
  #2  
Old 07-11-2018, 11:22 AM
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Join Date: Jan 2002
Location: Wilmington,NC
Posts: 4,371
Maybe this will help.

 
  #3  
Old 07-11-2018, 11:30 AM
Junior Member
Thread Starter
Join Date: Jul 2018
Posts: 2
Hey Thanks, I'll watch the video, not sure how I missed that video, I subscribe to his channel.
 
  #4  
Old 07-11-2018, 01:10 PM
Senior Member
Join Date: Jul 2004
Location: Easton, Pa.
Posts: 5,828
One mistake in description.
'Vacuum coming out'.
Vacuum never comes out. It's air being sucked in by the Vacuum generated from a running motor..
An important point for the first time do it your selfer that takes things literally.
A point not covered is the solenoids have the small cap on top.
That is an air port with a filter.
The solenoid has a plastic piston to control the vacuum ports.
The piston can stick from dirt or the filter has come apart and
and froze the piston movement.
 

Last edited by Bluegrass; 07-11-2018 at 01:48 PM.
  #5  
Old 07-20-2018, 04:36 PM
Member
Join Date: Apr 2007
Posts: 31
I just went through this on my 97 XLT. I had 4H light on the dash but was in 2WD. The transfer case motor was defective. The motor turned ok on the bench, but inside there are switches that work with the GEM module to control the 4x4 functions. After replacing, I HAD TO DISCONNECT the battery to reset the GEM module and all good.
 


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