Everything was working until the other day. The speedo and odometer stopped working 34 miles short of 200K!

There are two BLACK wires with identical female ends that would fit into the speedometer connector on the cluster. One of those Black wires has a little pigtail GREEN wire coming out with a male end. This black wire was plugged into the cluster. The little green wire coming from it was not plugged into anything.

I saw the other black female connector was empty so I assumed the geen wire went there. Nothing changed. I'm wondering if the speedo itself went bad and these wires are not needed. But the car is loaded, ABS, cruise, etc. So I don't know why they wouldn't be used. Even the radio volume is supposed to change with speed, although I don't think that happened. Maybe that was what the extra wires were for. I had a shop test the incoming voltage to make sure there was a signal coming to the speedo from the trans and it checks out ok. I guess I won't know until I have the cluster itself looked at.

Anyone have a recommendation for instrument repair? I found these four after a brief search online:

http://www.speedometer.com
http://www.mbcluster.com
http://www.dnaspeedometers.com
http://www.mrwhizard.com
http://www.instrumentclusters.com