ABS, auto 4X4 and traction control not working

2006 Ford Explorer XLT with auto 4x4. One morning out of the blue, a ton of warning lights came on. The brake light, the abs light, the traction control light, and the little open end wrench light all came on. I assume its some kind of sensor, but have no clue where to start. I know for a fact that the abs is not working. The auto 4x4 is also not working. It will go into 4x4 high, but you can not get the traction control to turn off. When you push the 4x4 low button, it just blinks and won't engage. London of a pain in the butt when you live on a dirt road and its February in Michigan. Any advice where to start would be greatly appreciated.