What would causespeedometer to stop working? Also ABS and Brake fault lights stay lit? 1500 RAM, 2W drive, 2003, gas 4.7l.

 

It is your RWAL sensor. My 98 Ram 1500 did the same thing. Mine is located on top of the differential.. It will cause your speedometer to not register until you reach about 20mph..then it will not register until a greater speed is reached, etc...

The ABS light and the BRAKE lighr will come on... Replace this and your worries will be gone...