I have a 2002 F-350 CC LB AT with a 7.3. I am having problems with the anti-lock brakes. When I am going slow, like in a parking lot, it feels like the anti-lock brakes feel like they kick in for a second and then the pedal goes down a little bit. Also the anti-lock brakes do seem to work all the time. I tried them this morning on a slick road and the brakes just locked up and stalled the truck. Not sure where I should start checking. The anti-lock light has not come one. It does come on when you first start the truck so I know the light works. Thanks