I have a 2002 ram 1500 the speedo isn’t working I have pulled the codes P0500 and abs codes 82 & 83 I have tried replacing the input and output sensors I tested the diff sensor for resistance it shows 1.7 ohms any ideas ?

 

Replace the sensor on the rear diff.

 

Already done no change at all

 

Any changes made to the truck prior to the lites coming on/speedo not working?

 

None truck is pretty much stock

 

Code 83: Tire revolution per mile out of range.

Code 82: Number of tone ring teeth out of range.

Still looks like the rear sensor is bad.

 

I have 20 in wheels which isn’t what it came with factory which I just found out I thought that could be the reason why it’s showing that but my speedo has always worked

 

Speedo gets its clue from the rear wheel speed sensor. If it isn't working.... lots of things get confused.

 

Replaced diff sensor again still no change

 

Need to start tracing wires.......