2002 Chevy Silverado fan switch

2002 CHEVROLET SILVERADO
120,000 MILES • V8 • 4WD • AUTOMATIC
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GENE_P
  • MEMBER
  • 3 POSTS
my fan switch only works in the 4th position is it the switch or the motor how do i test it?
Dec 5, 2007 at 3:44 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
If it works only in 4th, you need to check the blower motor resistor is on the heating/ventilating/airconditioning module near blower motor. The purple wire at blower motor should have battery voltage-if it does the blower motor is defective. If not backtrack it to the control switch see below.


https://images.2carpros.com/forum/automotive_pictures/12900_blower_1.jpg


https://images.2carpros.com/forum/automotive_pictures/12900_Blower_relay_1.jpg

Let me know if further assistance is needed
Dec 5, 2007 at 4:26 PM
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