My new daily driver. 1984 dodge rampage

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Did some testing.
Bottom connector [--_--]

The bottom is 12v constant
Top left is ground
Top right does nothing
......................._
Top connector l....l


Top terminal is ground all the time. Removing this wire is the only way to get the fan to shut off.

Both left and right do nothing

not sure how to test the temp switch. One side of the connector is grounded. When it reaches the correct temp it's suppose to complete the circuit and send ground out to though the other wire.