I have a 01 Ford Lariat F150. Dash light does not stay on and 4wd does not seem to activate. Checked vacuum lines and all seem to be working. Can hear clicking in dash when set on 4h and 4L. Actuator valve moves a little, not sure how much it should move. I`m a new member and any help would be greatly appreciated.

 

read this ----- transfer case gear box ------- then vacuum at axle.

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