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Re: '90 2wd blazer build up..
stock fans are turned on via a thermal switch, that switches a relay that turns on the fan.
I've had very bad luck with thermal switches in the past so i'm just running a toggle switch for it.
so pretty much, 12V ign hot > toggle > relay, Battery > relay > fans.
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-'73 c/10 - Low with Go - will be complete... probably never.
-'90 2wd Blazer - well... soon enough anyways.
-'84 SWB - the daily gas guzzler.
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