Just a follow up. My problem is solved. It was a stuck float. The float was stuck at a low fluid level even though the coolant was topped off. I figured it out by pushing down on the float with a screw driver to check the function of the switch while a VOM was attached to it. It was then I discovered the switch worked right when pushed on the float a couple of times.
The crazy thing is I have driven it over 2000 miles with that light blinking! So it was stuck all that time.
The simplest things sometimes.
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