manually controlling the fans

hello all. im hoping someone here will be able to help me. i have an aftermarket (canned tune) PCM. this pcm is set to work with a 180 degree thermostat, however i choose to keep my stock 195 in. needless to say, my cooling fans a pretty much always on. i could send it the pcm back for a change and be without a car for who knows how long. i could just get a new/different pcm with settings to my liking, however i dont have $100 for this project. it would be much cheaper for me to buy some wire, and a couple toggle switchs, and maybe another part or 2

im basically wondering which wires i should splice into for the toggle switch(s). should i just splice right into the wiring harness at the fan shroud, or is there a certain wire on a relay i could splice into without setting an SES??

any input will help, thanks!

Something like this?

http://www.zzperformance.com/grand_prix/products1.php?id=194&catid=107

Wow, they take you to the cleaners on that thing.

Is there a reason you kept the 195 stat? Seems the easiest and most logical would be to put a 180 in it. If it gets cold where you live in the winter, then change it back in Nov. It takes about 2 minutes to change a t-stat in a 3800. Just my :2cents:

Yeah, I've kept my 180* in for a long time and it does suck in the winter. I'm definitely going to swap the 195* back in for this winter so my car doesn't take two hours to warm up. :rofl:

im basically wondering which wires i should splice into for the toggle switch(s). should i just splice right into the wiring harness at the fan shroud, or is there a certain wire on a relay i could splice into without setting an SES??

any input will help, thanks!

The best method of control and safety on electrical components is via the cooling fan relays. There are a total of 3 but you should use a GM wiring diagram to properly connect the wiring.

Anyone have the instruction sheet on the ZZP kit? I wonder if the kit taps into the relays at the main fuse box. :dunno:

Note: Although it may look like the cooling fans run all the time they probably don't once you get going with proper airflow to the radiator/engine and the fans are inhibited for turn on at speeds around 40 mph and up.