Speedometer not working in 2002 Peterbilt. How do I check for what's wrong?

SOURCE: Speedometer not working

Hi there the speed sensor is located at the fron of the transmission between the two transmission cooler lines. Hope this helps you out

SOURCE: Speedometer not working

speedometer get speed signal from ABS. ABS and DSC are two functionality in same ECU. 
You shall read faults from ABS/DSC ECU.
Most frequently, there are problems with speed sensors on wheels.
With ignition on, you shall measure voltage on both wires (- pole of voltmeter shall be connected on vehicle ground). You will see one sensor without voltage supply. This will sensor with problem. you can, for check, change sensors on same axle (left and right). 
Switch ignition off, and on. 
If voltage supply missing will go on another side (with faulty sensor), you will be sure that is problem is sensor.

SOURCE: 2002 Honda Civic. Check engine

it is quite a serious problem, and it has a lot of reasons why, it happened to me too, although we differ in some parts, in my case, all of the dash indicators lit up, what i did was to let an auto electrician rewire the car, and he found out that there were "burnt" wires and could lead to more damage. try to have it checked, it may save you lots of money. hope it helps.

Harvey N Tawatao

• 3854 Answers
• Posted on May 04, 2009

SOURCE: 2002 Toyota Sienna speedometer quit

Yes it is all related. It sound's like your speed sensor (VVS) has gone bad. There are two of them, one is an in put Velocity sensor and the out is the out put Velocity sensor.
Your going to have to get the Van scanned to find out which on has gone bad. Most of the time it's going to be the out put sensor and it not that hard to replace. 
You can do it your self or a transmission shop, as for getting your Van scanned for the codes to let you know which sensor when bad. Auto Zone or Parts source will scan for free and can give you instructions on how to locate and replace the sensor.
Good luck and hope this helps.

SOURCE: speedometer on 2005 escalade quit working

You need to go to www.speedometersettlement.com. And Hurry!! This has caused lots of drama for many owners. Good luck