2005 Ford F-150 4 wheel drive engage

Tiny
2005F150
  • MEMBER
  • 2005 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 60,000 MILES
I read a message posted on 12-3-07 to "check the knuckle in front" for vacum hose break. When I turn my selector to 4 high or low the light does not come on or engage. I want to know where this knuckle is located or other things I can look for.
Thursday, December 13th, 2007 AT 5:32 PM

2 Replies

Tiny
FLEXY5
  • MECHANIC
  • 512 POSTS
The knuckle is located directly behind the front brake rotors. If you look on top of the knuckle, you should see the vaccum hose sticking up.
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Thursday, December 13th, 2007 AT 5:36 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,251 POSTS
If the light does not come on check fuses and underhood fuses, switch. Seems electrical.
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Thursday, December 13th, 2007 AT 6:23 PM

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