No HVAC Fan Power - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 1 (permalink) Old 07-03-2016, 04:57 PM Thread Starter
Join Date: Jul 2016
Posts: 466
No HVAC Fan Power

Working on a 2005 base coup.
No power to fan motor.
New replacement motor works well by connecting it to 12V power supply.
Traced black ground wire to Ground all the way to NEW speed control switch. Traced orange wire from switch to resistor pack to motor.

I verified all 3 fuses. This includes 10 & 16 on the BCM and BCM3 on the under hood fuse block. I even soldered a short to pins 87 & 87a on the BCM relay #30. Still no power to the fan.

Now I'm lost and ready to hack the BCM or just bypass it and hard wire the fan connecting the brown wire to the fan to a good 12V source on the BCM.

and again Thanks to Coby7 for posting the color schematics
1966tbird is offline  
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