Where is the temperature sensor on a 1994 Olds Regency ?

Asked by Mar 22, 2017 at 01:02 PM about the 1994 Oldsmobile Ninety-Eight 4 Dr Regency Sedan

Question type: Maintenance & Repair

The engion temp gauge on the dash isn't working.  Where does it hook into the
motor?

1 Answer

25,575

See pic below. Manual states: "It is normally open and only completes the circuit when an internal element expands (in response to heat) to close the contacts. If the vehicle has a cold engine warning lamp, the sensor includes two sets of contacts. One set is normally closed and opens as the internal element expands. This action breaks the ground circuit to the warning lamp. The other set of contacts functions if the temperature rises far enough to close them, turning on the high temperature warning. If either of the temperature lights is lit while the engine seems normal, just unplugging the wires from the sensor will provide valuable diagnostic information. If the lights remain lit, there's a short to ground in the wiring from the lamp to the sensor. The service needed isn't to the cooling system, but to the warning system. If the lights go out with the wires unplugged and the engine seems normal, it's entirely possible that the sensor has failed and needs to be replaced. Nevertheless, don't just unplug the wires and forget about them. This could be disastrous for the vehicle owner should a cooling problem develop without warning."

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