2009 ford f150 wont go in 4 wheel drive until switch ing on@off

Mark Chaney

• 60 Answers
• Posted on Jan 19, 2009

SOURCE: 2001 ford explorer sport trac 4 wheel drive wont work

Start the car
put in " N"
turn the 4X4 switch on
Then put in gear..
What do you see now?
Do the same in reverse when you take out of 4X4

SOURCE: 2005 Ford F150, 5.4L V8, 4x4; The transfer case

Encoder motor located on the transfer case is usually the problem. It is the motor that shifts the transfer case.

Testimonial: "Will look into this and report .Thanks so much"

SOURCE: 06 F150 4 four wheel drive wont work

I have a 1994 ford f150, my 4 wheel drive keeps trying to engage by itself even without me touching the automatic hub button....at time you can even hear it engaging and disengaging by itself, the low range light even comes on (dimly)...what could be the cause? the transfer case motor looks good and so does the wiring.

SOURCE: 2004 ford f150 supercrew will not engage in 4

Could be a problem with the vac lines to the IWE ( Integrated Wheel Ends ), or a problem with the IWE solenoid, or a problem with the vent from the IWE.

Start with checking the vac lines, to make sure they are not cracked.
The vac res & IWE solenoid are behind the battery. Here is a diagram of the parts in the IWE vac system


There was a TSB for the 2004-2006 MYs with a bad design IWE solenoid, but this usually was coupled with noise in 2WD.
Start with checking the VAC lines and the vent, next would be to check the IWE solenoid.

Here is the PDF of the TSB on IWE solenoid
http://my.voyager.net/~sscully/file_tsb06_08_15.pdf

SOURCE: 2001 ford f150 supercrew 4x4......4 wheel drive

There is a special sequence for that. Let me see if I can remember... Pull to a level surface, put the parking barake on, put the truck in neutral, shift to four-wheel drive, release the brake, shift to drive.

The computer waits for this sequence. It has been many years since I did this. If it doesnt work, call your dealer shop and they will tell you the correct sequence.