Originally Posted by BrianBrave
Steve,
When my SRT sat on the dyno (engine shut down), they would leave the ignition in the "on" pos.
Concerned - I asked why - I was told that whenever the key is on, the IC pump is running (regardless of temps) - thus coolant was circulating through the HE and the big fan they set up in front of the car was helping to cool the SC. (kind of like your idea) I have not tested this or know if it is true, but you could test that out easily.
I'm sure you could just tap off the + pump voltage wire to signal your new fan relay (I am assuming you are using a new isolated power source for your fans) then just click your key fob remote to turn the fans on and off.
Well if the pump is on anytime the key is on I have no need to do anything. I had spoke with HDDP a few weeks ago and had asked him if he knew what told the pump to turn on, I figured it was controlled by tempeture. HDDP said he thought that the only time the pump ran was when the supercharger was engauged, but I don't think he was 100% sure. I hope what you said was right, in the repair manual the voltage runs through fuse #13 under the hood and the way I understood it, there was no power to that fuse until the control module sent it there. And on the fans I installed, they are on their own circuit and the relay is built in with the reciever. My main goal was to have the coolant circulating while the fans were on, so if the pump runs anytime the key is on I'm OK
. I'll have to do a little testing, but while I had the front of my car off (car running) I didn't think the pump was running, at least I couldn't hear it or feel a vibration of any kind.
I do know that there is a fan the the box that houses the ECU and it runs anytime the key is on.