@Patrick Feeley has posted the VSS checks somewhere on the forum. But if wiring and everything look good then the VSS is most likely it especially if the speedometer is jumping around.

 

Thanks white, no speedometer jump at all.... Just dead

 

Here's the Introduction and PinpointTests for both the VSS and PSOM since they both deal with P0500. Diagrams also. Cheers!

 

Thanks for this patrick. Will be really helpful.

I do have a couple of questions though "breakout box" have seen this term before, what is it?

The VSS green/black to ground shows for cable driven speedo? Is this correct? I have to gound on my f250?

Thanks again

 

A breakout box would be a cabled box that would go between the PCM connector and the PCM and allows one to easily probe the various pins. It is not necessarily needed but makes like much easier. I wish I had one! Some tests are done with the PCM left disconnected (in which case you can just probe the various pins right from the PCM Connector without a breakout box ... can be a pain but doable) and some are done with the PCM connected (in which case you would need to backprobe the PCM connector while connected to the PCM which is a real PITA without a breakout box. The splice to ground would be only for a cable-driven VSS (so doesn't apply to you). Cheers!