I have an '04 4x4 1500 Quadcab Laramie w/ 5.7 with just under 80K on the odometer. This morning, the ABS pump kicked on and continued running until I pulled the ABS pump fuse. The Brake and ABS lights are on, and the speedometer still registers correctly. I broke out my code reader this afternoon, but no codes were found. I pulled the plugs on the top of the pump assembly to check for corrosion/water intrusion; all normal. I think I'm going to start by swapping out the rear speed sensor and see if that solves the problem. Any thoughts on cause/solution?