The thermostat is a mechanical device that is buried inside a metal housing. The electrical connectors in the photos are for the two coolant temperature sensors. The one with the single yellow wire is only for the gauge on the dash. You want the one with the two-wire connector. That is for the Engine Computer. If that sensor or its wiring have a problem, it could incorrectly tell the computer that the engine is colder than it actually is. That will result in too much fuel going in and black smoke from the tail pipe.
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Wednesday, May 18th, 2011 AT 5:24 PM