Fan always on
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Fan always on
Need help with a new issue. Haven't done any work to the car recently, but I just noticed the cooling fan turns on automatically when the ignition is on, and the a/c is off. I have automatic climate control and the fan stays on even after setting the climate control to "econ." Any ideas on where to start???
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Where to start? A shop manual and the wiring diagram.
Unplug the fan relay and see what happens. I've had one stay stuck in the on position on mine. Caused the fan to run whenever key was on.
Unplug the fan relay and see what happens. I've had one stay stuck in the on position on mine. Caused the fan to run whenever key was on.
Last edited by 86PACER; Aug 24, 2008 at 04:02 PM.
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 1,161
Likes: 0
From: Orangeburg, NY
Some additional information: ignition on- car not running- the fan is off. With car started - fan on in econ mode. Disconnected the relay- fan off. New relay - fan still on.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Open the connector in the A/C pressure line, jumper the two contacts, start the engine---fan should not be off. If so replace the sensor
Open the connector to the coolant temp sensor in the base below the LH side of the TB and start the engine...the fan should not be off. If so replace the sensor.
BTW, have you pulled trouble codes and checked in Field Service mode to see if the ECM is going closed loop??
Open the connector to the coolant temp sensor in the base below the LH side of the TB and start the engine...the fan should not be off. If so replace the sensor.
BTW, have you pulled trouble codes and checked in Field Service mode to see if the ECM is going closed loop??
Team Owner
Joined: Jan 2003
Posts: 20,333
Likes: 263
From: Summerland B.C. Canada
Open the connector in the A/C pressure line, jumper the two contacts, start the engine---fan should not be off. If so replace the sensor
Open the connector to the coolant temp sensor in the base below the LH side of the TB and start the engine...the fan should not be off. If so replace the sensor.
BTW, have you pulled trouble codes and checked in Field Service mode to see if the ECM is going closed loop??
Open the connector to the coolant temp sensor in the base below the LH side of the TB and start the engine...the fan should not be off. If so replace the sensor.
BTW, have you pulled trouble codes and checked in Field Service mode to see if the ECM is going closed loop??
Team Owner
Joined: Jan 2003
Posts: 20,333
Likes: 263
From: Summerland B.C. Canada
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