Intermitent Grinding Noise on 2004 F150 4x4
Senior Member
Joined: Apr 2010
Posts: 477
Likes: 0
From: Alabama
I would have answered sooner but I've been out of town visiting family, cutting firewood, and killing deer. Read these;
http://www.ford-trucks.com/forums/83...then-some.html
https://www.f150online.com/forums/20...replacing.html
...OP may not even have his truck anymore!
http://www.ford-trucks.com/forums/83...then-some.html
https://www.f150online.com/forums/20...replacing.html
...OP may not even have his truck anymore!
Last edited by 60DRB; Dec 31, 2012 at 07:23 AM.
Senior Member
Joined: Nov 2012
Posts: 256
Likes: 1
I have a '05 f-150 and have experienced all the same grinding issues that i have read throughout but in addition to the grinding/4x4 not working the a/c doesn't work either. Narrowed the issue to the relay switch that controls both. I have had the relay switch replaced 3 times along with vacuum iwe solenoid and battery. vac lines have been checked for water, cracks and pressure checked. 2 fault codes have come up on the 4x4 one being low voltage the other being high voltage (dont know the actual code) which prompted the battery change.When I leave the dealership all is good until the next day or two and the 4x4/a/c go out again. I think the dealership is running out of ideas and so am I. Does anyone have any suggestions where to look next?
The dealership should be able to tell you if the 4x4 control module is bad or not. Other than that, start tracing all the wiring harnesses for broken or chafed wiring. Any electrical connections you take apart should have dielectric grease applied when put back together to prevent corrosion.