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Years ago I installed a flex-a-lite main fan but I ditched their fan controller as it was junk. Fans are simply hardwired to battery via a "ground on" thermocouple in the radiator fins. Works great but I realize now (took years) that my AC is weak in traffic because fan isn't wired to come on with AC.
For now I put a ground switch in the cab to ground the relay...in traffic I can manually turn the fan on, just remember to turn off as it's battery wired. Is there a better but easy way? An AC activated ground I can tap?
Second, did the stock fan clutch have an AC-on link? I can't remember but iirc it was just a mechanical clutch.
I dug the internet and all was about newer generations and tapping power at an AC control switch by the blower.
 

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95.5 Tacoma
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Blower control is probably your best option for A/C on trigger lead. The stock fan clutch is mechanical. Increases air flow as temperature increases.
 
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