Fan Relay 2 Speed Cooling Fan Wiring Diagram. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method. 30 other red wire needs constant 12 volt power from the battery.
86 gray white wire goes to the ignition switch. 87 red wire connects to the positive wire on the electric fan. Adjustable fan switch with radiator probe ground switching non variable speed only 30 40 amp fan 1 fan 2 hayden 3653 pn.
Start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay tab 87.
It uses a 40 amp electric relay and electric fan sensor. The color coded diagram below will correspond with the wires on the relay kit to help simplify the wiring process. For this set up we also used two of the speedway universal electric radiator cooling fan part number 910158 which comes in a 10 12 14 or 16 inch diameter. Protects relay from arcing damage due to fan spinning after shut off.
