I have been trying to figure out how to go about troubleshooting my speedometer unit. I don't have speedo or ODO. This is all of the information I have so far, and I would appreciate any input I can get.
I apologize in advance if this has already been discussed. I have tried my best to look for a thread or how to, I hope I do not cause a huge repeat.

I found two wires coming out of my diff's speed sensor, one is brown and one is brown with a red stripe. In the cluster I found two pins at the speedo that made continuity with the brown wire and one pin that made continuity with the brown/red-stripe wire. I tried to post pics but they are too big.
Is there a way I could use these pins to see if I am getting signal from the sender/sensor itself?
I would also like to exploit the exposed pins to see if the speedo is receiving power, as there is no light on. Is there anything I can expect to see? I guess I could go on