ABS Sensor location; leaf spring hits

[bbdano]

Hey guys,
Got a couple of issues with my 2005 F250 Super Crew 4x4 Shortbed, 6.0...
I got and ABS light that pops on and off when ever it wants. It didn't come on for the past two weeks when tempurature has been in the twentys. Now that its warmed up a little 30-40s its been showing its ugly head now and again. Of course my Ford dealer wants 75 bucks to diagnose the problem. I thought may be it was one of the wheel sensors. If anyone can tell me where they are located, I'd get down there and take a look to make sure its not a wire issue or the whole thing being loose.
Second issue, the rear helper leaf spring is constantly hitting the snubbers on the frame at the rear end of the spring. I just went out to look at it and the spring is a little over an inch away from the snubber, and you can see the spot on the leaf where it has been hitting the rubber. The sound it makes is so annoying, I almost don' t like driving my truck! For the longest time I thought it was something boucing around in the bed, then I thought the guys at Line-X didn't bolt the bed back on tight enough...but noooooo, just some krappy design by the engineers at ford.
If anybodys got any information or fixes, on either issure could you pass them my way,
Thanks,
dano