I can turn the radiator on, on demand, which means I can keep long hill-climb temps down better than the ECU. It also means I can force cooling during DFCO so that "free" power is the source. Also, at lights or other engine-off jags, I can cool the coolant in the radiator itself before engine-on circulates it more.
Here are pics of the set up.
For the power I chose the unused AC condenser fan motor connector, seen on left in this schematic (highlighted in yellow):
here it is photographed:
I made a simple and stealthy wire connector using flat male and female terminals soldered onto the wire. It is meant to be sturdy but easily reversible. Here you can see the conduit and the two ends, including the connection to the radiator fan motor wire (the crimp connector is blue):
When installed, it is almost completely invisible. Here is the conduit under the sill and latch for the hood. In two minute I can reverse the whole set up for visual inspection before SMOG testing, if necessary:
Switch is on the dash.
DOWNSIDE: I have to activate the AC switch and have the cabin fan running. Hahaha! At some future point I may simply change where I scavenge power, but this was convenient, stealthy, and required the least alteration to the stock wiring harnesses. I just plugged into the unused condenser fan motor connector. That was hard to pass up.