I also cleaned plug with electrical cleaner and checked for voltage at the wire and plug.

Response from jestergmc
1 question asked

Raise rear wheels off ground place DVOM meter on AC scale trans in neutral. Rotate tires by hand @3mph meter shloud read .5 - 1 v AC

Answered by Docfixit (expert)
18,443 answers provided

Do I take the reading off the speed sensor? If it read good or bad what are the options?

Response from jestergmc
1 question asked

Yes reading off seed sensor this will tell if signal is being produced

Answered by Docfixit (expert)
18,443 answers provided

I got readings that jumped from 0 to 1.5 but had to turn the wheels at higher speed to get anything? So what does that mean?

Response from jestergmc
1 question asked

Is there something simple that I am missing?

Response from jestergmc
1 question asked

Find VSS buffer item F in first diagram on firewall near ECM. Check White Wire term.10 for output to speedo also check input signal from VSS

Answered by Docfixit (expert)
18,443 answers provided

I am having a hard time finding the VSS. Is it on the engine firewall or in the cab?

Response from jestergmc
1 question asked

Info I have firewall next to ECM

Answered by Docfixit (expert)
18,443 answers provided

Thanks. I found it and fixed it.

Response from jestergmc
1 question asked