my abs light comes on after driving on the highway for a couple. anybody have any knowledge on this. any ideas..

 

get a abs/obd II scanner, it should point you in the right direction. just make sure your vehicle is covered by the scanner. I just bought an actron 9449, but it looks like f150's are only supported up to 2005.

I already had a regular obd II scanner, from my mountaineer's CEL going off. I just ran it last night, and says I basically have a bad/disconnected rear sensor, but haven't had a chance to get it up and look at it.