Ok i have a 1995 dodge ram 2500 cummins manual transmission. My question is, my speedo isn't working, i have three wires coming from the sensor off of the transmission, one wire looks to be going through the firewall assuming to the guage, one wire to negative side of batter, the other is connected to nothing just sitting in space. Anyone know what these wires plug into or wire up to or have a diagram of what they should be going to? I just need to connect these wires to the correct location before i buy a new sensor that might not be needed.

Thanks for any suggestions

 

One should be a five volt power feed, another one is ground, and the third one is sensor return signal to the cluster. Likely your broken wire there is supposed to be the power feed.

 

Ok sounds good, where would that power feed be so that i could wire it in?

 

Should be in the same harness that the other two wires are in. Follow them back, see what you find.