Water Temp Gauge

[Marc & Tavie Glassmire]

The water temp gauge on by bus quit on my last outing. Is there a
way to find if the problem is the sending unit or the gauge. I have
pulled the dash panel and looked at the back of the gauge and believe
that is is an electric guage vs a mechanical gauge because is has
three screw type terminal posts. I have also pulled the dog house
and found what I think is the sending unit on the back upper right
side of the radiator. This sending unit has a single large diameter
(6 or 8 gauge) wire coming from it. The back of the gauge has 4
small diameter (16 or 18 or 20 gauge) wires, 2 to one post and 1 to
each of the other two posts. I am not inlcuding the wire for the 53
size light bulb. The only other info that I have is that normall the
indicator would be at rest at about 10 or 10:30 when the engine was
off or cold. Now with it not working the indicator is pointing
straight at 9:00. Is there way to find the problem? Whare does one
buy a new gauge and sending unit? How does one know for sure which
sendind unit is the water temp sending unit. You car reply here or
to patches@....
Thanks in advance,
Marc Glassmire
King George, VA
1988 35FC