Camaro and Firebird Picture by jczoka | 8239907 |

Here are the schematics from a 91 camaro w/AC.
Both fans will come on if there is AC pressure. Otherwise they're pretty independent. Primary fan is controlled through the ECM. And the secondary fan needs AC or coolant switch, and is not ECM controlled.

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jczoka September 19, 2017

Here are the schematics from a 91 camaro w/AC. Both fans will come on if there is AC pressure. Otherwise they're pretty independent. Primary fan is controlled through the ECM. And the secondary fan needs AC or coolant switch, and is not ECM controlled.

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