1999 Pontiac Montana

1999 PONTIAC MONTANA
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BAROSJOEY
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  • 3 POSTS
Engine Cooling problem
1999 Pontiac Montana 6 cyl Front Wheel Drive Automatic

i have changed t stat, t stat housing, sensor on housing and both fan relays. cooling fans still not working is there a temp switch if yes where is it located
Apr 20, 2010 at 4:13 PM
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JACOBANDNICKOLAS
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Are you sure the fan motors are good? As far as the switch, the sensor can be found on the right side of the engine.

Here is its purpose:

"The Powertrain control module (PCM) controls the operation of the cooling fans. This is accomplished by providing a ground path for the cooling fan relay coils within the PCM. The relay contacts will close and complete the circuit between the Maxifuse® in the underhood electrical center and the fan motors. Whenever there is a fan "on" request, both fans will be running. A coolant temperature switch activates the fan motors. A transducer can also activate the circuit, depending upon A/C request or A/C compressor head pressure to the condenser."

Let me know what you find.
Apr 25, 2010 at 12:09 AM