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Open the hood, look in the middle space between the firewall and motor. You will see the sensor comming out, IT LOOKS LIKE A SPARK PLUG. YOU WILL ALSO SEE THE CONNECTOR COMMING UP TOWARD YOU. MAKE SURE MOTER IS COOL BEFORE LOOKING.

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15y ago
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18y ago

On the top drivers side of the engine where the upper radiator hose connects. The thermostat is in the same assembly that the Fan sensor screws into and is removed by taking out 2 bolts.

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15y ago

Follow the Upper Hose toward the motor and when it ends, that's the housing.

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9y ago

The coolant temperature sensor on a 1993 Mercury Topaz is located at the rear of the engine. To get to it, you have to remove the driver side fan.

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