The more I look at the manuals (03-06), the less I seem to be able to determine. Certainly the 4 WSS's connect to the ABS controller , Connector C-103, and the PCM...so I am not sure what the "sensor wire" really is.
Interestingly, I have not found a diagram for the speedometer in these Gen III manuals...will keep looking, as I am surely missing somethins here.
It MAY help to know just what it is that you are trying to accomplish.