TeamRX8

iTrader: (25)

so another trick is you can jumper a wire using the same method above, except from the ground side of Relay #1 to the ground side of either Relay #2 or #3. What this will do is always run both fans on high speed whenever the low speed relay #1 triggers at the initial 209°F. The fans will cycle on/off more this way, but it will help keep the coolant temps down more rather than waiting for the higher high speed relay trigger temperature to do so.

Or as also detailed in the DIY area you can set the whole think up as I described but wired through a switch in the interior that you can flip on to run the fans continuously regardless of temperature whenever the ignition switched is keyed on. This can be useful in the summer in extremely hot climate areas.