ABS,BRAKE,ENGINE LIGHTS 02 RAM 1500
 

I have a 2002 RAM 1500 and the problem I'm having is that the ABS,BRAKE and ENGIN lights came on at the same time and also my A/C is not working or my DEFROST. Now I checked the voltage and it reads 1.3v. I saw on this link http://www.carcomplaints.com/Dodge/D...are_on.shtml#7
that a guy changed his DIFF SPEED SENSOR and everything went back to normal. Now if I did the same to my truck will it work and does it have a DIFFERENTIAL SPEED SENSOR?