Ford Repair: Temp guage, ford f100, water jacket

Question
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Followup To
Question -
I have a Ford F100 with a 302. The guage doesn't appear to be accurate. Where is the sensor. And how can test the guage. Thanks
Answer -
not enough info..........year?

Sorry, its a 1975

Answer
Hello and thanks for the reply...I'll try to help.
The gauge sending unit is either in the thermostat housing OR it will be located in a water jacket in the intake manifold. To test it, just ground the single wire and see IF the gauge moves to hot. If it does, the gauge is good and the unit is faulty.........whihc is usually the case.
Hope this helps,
Erik