Here's a pic of the back of my trans. It looks like there could be 3 sensors but at the very least 2. One single sensor at the tailhousing near the spud shaft and u joint and another one(or two?) that come from the black box at the bottom.
I am getting power at the speedometer and when I turn the key on without starting the truck the speedometer does indeed jump slightly as it is supposed to.
BTW thanks for that link. I was able to find an in-depth guide but now I need to figure out exactly which model of speedometer I have before I can proceed. No markings or labels on the back as best I can tell.
Did you try to open the link I posted as home page?It has what you need to look at.With two sensors on your trans tells us that one is for the ecm and the other is for the speedometer.One way to check the head is look and see if the tachometer don't have a plug in wiring like the speedo.It should and you can plug the tach wiring into the speedo and start the engine.The speedo should now move some wht like the tach if its good.Also some of the sensors have the same plug in on them and you can plug one into the other at the trans and see if this makes the speedo work.The link I posted shows how to ohm out the sensor.
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