We are starting to get a ABS light on our 98, it kinda comes and goes, usually out when its raining, on when its sunny. I read a post over on the f-150 page about a sensor rubbing the rear differential, does that apply to the Expy's also or is there something else i should look for? Thanks,

 

It sure does apply to the expy as well. You can test with an ohm meter, forget what number it's supposed to be around. OK found it, positive on the left tab negative on the right on the actual sensor itself on the top of the rearend (unplugged of course). The reading ought to be between 900-2500 ohms. Mine was at 0 when I had ABS light, replacement sensor fixed my problem.