Thought I'd give an update.
Received the Wind Test Cable yesterday. Plugged it in and no reading. So I called Davis for troubleshooting. Turns out there were two problems.
1. The console was set to receive on Station 1, EXCEPT for the Wind sensor... Well, before that he helped me set the console to Station 4 to lesson the likelihood of a neighboring weather station to cause interference. Anyways, we were verifying everything was now set to Station 4 and the Wind was on 3... Once we corrected that, the Wind Test Cable provided a reading, however the anemometer did not. I assumed it would be time for a new one. Nope.
2. "Sometimes the reed switches get stuck and need a good rap to wake them up". Yup, beat on it with a screwdriver handle a few times, we have output from the anemometer!
So unless/until something else happens, I have a fully functioning Vantage Pro2 for the cost of one battery and a bit of time.