temp gauge not responding

["K Creason" <dmc4687@xxxx>]

My temp gauge suddenly died this afternoon. It points straight down and
doesn't quiver.
All my other gauges and electrical instruments seem OK.

The green wire is securely nutted to the sensor post in the right front
cylinder head. That is the right wire and sensor, right?

So, I went to measure with my meter at the gauge. It has three posts with
electrical connection-- according to Zilladude's nice diagram (y'all better
get it)-- the bottom post is ground, speedo side post is sensor, and door
side post is positive voltage. I clip three little alligator test leads to
those so that I can switch my meter around easily. :)
So I should see 12v between the door-side and the bottom post, which I do.
What should I see between the sensor and the ground? I see a quickly
fluctuating number about 150 millivolts, even with key off. Not totally sure
that is something I could measure with voltmeter, though.

Suggestions?

Kevin
#4687
Houston
---------
I read this somewhere:
"most experts agree that the end of the world will come by accident, most
likely. That's where we come in; we're Computer Experts, we make accidents."