Put the truck on the ground, lay under the front and have somebody jiggle the steering wheel back and forth. If you can't pinpoint it exactly, then use a large screwdriver as a stethoscope by pressing the blade in the joint area and the handle in your ear.

I'm not making this up...

 

thanks i will give that a try as soon as i can get somebody to help me with it.

 

I have a 2000 f150 bone stock. It started squeaking about 3 months age .
Cases of WD-40 and the squeak is still there. Some say in might be the Pitman Arm any help would be great.