Connect yellow and grey wires to ground.
Dual electric fan wiring diagram with relay.
Then connect switched power usually from your ignition switch to the blue wires on both relays tab 86.
30 other red wire needs constant 12 volt power from the battery.
It uses a 40 amp electric relay and electric fan sensor.
Primary cooling fan dual fans with dual relays single speed on off using ground switched devices only for primary activation using dual relays for two fans is not required.
The fan will turn on when the a c compressor activates.
For example dual thermostat switches or dual relays could be used to control each fan separately.
It uses our 40 amp electric relay kit part number 91064044 and electric fan sensor part number 91064013.
Finally run a fused constant power to both of the red wires on the relays tab 30.
86 gray white wire goes to the ignition switch.
Connect the red wire to the sending unit wire of the original fan relay harness.
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.
Or a single relay could be used to control both fans.
And if a relay fails you will still have one fan running.
Cooling fan relay wiring diagram how to wire a fan relay hvac in dual fan relay wiring diagram image size 730 x 656 px and to view image details please click the image.
However two relays will divide the load.
87 red wire connects to the positive wire on the electric fan.
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Here is a picture gallery about dual fan relay wiring diagram complete with the description of the image please find the image you need.
You could use one relay.
The orange wire from the a c relay goes to the 12 volt of the a c compressor clutch wire.