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Originally Posted by 90FormulaWS6
take the lead to the coolant temp and hook it up to a ground...
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You mean fan switch (like on the 3rd gens). That is probably not a good idea for the actual CTS.
I think the ECM completes the ground side of the relays in that car, so it should not be hard to ground that circuit. Does your car have 2 relays or 3 for the fans (does one fan turn full speed at lower temps, or both at slower speeds).
Why do you even want to do this? Do you have a cooling problem or is this for cool down at the track?
see here;
http://www.njfboa.org/forums/showthread.php?t=17456