Question about 2004 Chevrolet Express
Intake fan (below windshield) turned on by itself, key not in ignition, had to disconnect battery to stop it.
The first thing to test is the [bitron] sensor its on the side of the radiator this sensor overides the ign system.a simple test can soon establish if this the fault.to test ;1 disconnect the wiring plug from bitron switch ,bridge the two contacts in the wiring plug useing a lenth of spare wire and switch the ign on if the fan now operates the switch is faulty [replace]hope this helps you.adrain
Posted on Feb 18, 2009
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Posted on Jan 02, 2017
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