Check the ground wires to the instrument cluster, even if it means running a new one temporarily as a test. 

Also check the connectors at the sensor and unplug and replug the instrument cluster connector several times. 

Jim

On Feb 17, 2013, at 1:32 AM, Bill MacLachlan <billmacla@GMAIL.COM> wrote:

> hi all.
> Time for some list help...
> 
> Drive across town this pm. Coolant light starts blinking.
> The temperature gauge needle is right where it should be - in the middle.
> The engine is not hot.
> There is enough coolant in the tank.
> The V belts are tight.
> 
> I'm thinking a sensor has gone sideways or a ground.
> 
> What's the most likely culprit ?
> 
> thanks all.
> 
> Bill M 89 westy