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Old 08-15-2005, 10:56 AM
sbourg sbourg is offline
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
The normal way to test such a switch is to connect an ohmmeter between the pins while the sensor sits in a pot of water. Bring the water to a boil and see what happens. Add a little salt to the water to raise the boiling point a tad.

If the switch contacts close in this test, then either your dash gauge is inaccurate, or the coolant is not PROPERLY flowing past the sensor.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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