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Old 07-20-2005, 07:38 AM
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Join Date: Jul 2005
Posts: 17
Coolent Temp Switch - open or closed?

1988 420 - When the engine is cold what position should the switch be in?
Ohms - Cold ?
Ohms - Hot ?
My Elec fan runs all the time.
I grounded the two wires to the coolent temp switch
The relay clicks and the fan slows down.

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Old 07-20-2005, 08:12 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153

The blue 2 pin sensor is (NTC) variable & at low temps has high resistance.

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