so, now you can
control the speed.
use either stock temp sensor or your aftermarket.
run the fan on or off, instead of speed control.
feed the stock gauge with a constant 5v vr for the gauges.
have a check for loss of temp sensor(either one?)
still need to confirm 90 percent driving either on/off or loss of temp sensor.
a/c signal
adjustible on by temp

anything I forgot?