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Issue with cooling Fans

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Old Sep 24, 2021 | 03:47 PM
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Talking Issue with cooling Fans

Looked around and could not see specific reference on this issue.

Ok, I have an issue with my cooling fans not turning on High when AC on or when temperature rises. They kick on fine on low speed mode, but won't go to the high speed and the car gets hot with Ac and in traffic. New build original on 2002 ls1 motor(By Texas Speed) just installed and up to speed last week. New cooling fans were installed as well with stock replacements. I know there are 3 relays in fuse box for the fans, any chance that all 3 need changing? Local parts store has the replacements in stock. Any ideas from the group on past issues like this? See particulars below.

2002 Trans Am Ls1 WS6 fast 92 Intake, Nick Williams Throttle, PRC heads and cam. Texas Speed Headers and 3" True dual exhaust etc.
New installed 3 core Alum radiator. Standard Thermostat

Build resulted in 406 RWHP, tuned by Pat G Tuning in Victoria. Runs like a scalded cat now compared to stock.

Just got this fan issue to get over now.

Thanks for any help to the group.
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Old Sep 24, 2021 | 05:00 PM
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I would test all 3 relays.
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