I have a 10 gauge wire running to the fan controller from block 1. thats really just a guess, the wiring is included with the kit, so it will be what ever is in the kit.
fan controllers are basically a relay that are activated automatically. they consist of a temp sensor that goes into the coolant passage. the sensor is wired to the fan controller, and when the coolant gets up to a certain temp, it supplys power to the relay, turning the fan on. when the temp goes down pass a certain point, it shuts the fan off. these kind are called adjustable thermostats. most of the kits also have a wire that goes to the air conditioning system so the fan turns on when the a/c is turned on.
the kit im getting has the sensor in the coolant, this sensor is basically a heat activated switch and when the coolant gets to 185, the sensor closes and the relay becomes grounded and the circuit becomes closed, activating the relay and turning on the fan. when the temp goes down to 170, the sensor opens the circuit cutting off power to the fan. both versions require a line to a switched circuit.
thanks and have a nice vacation!
