Dual Electric Fan Wiring Diagram With Relay

Or a single relay could be used to control both fans.

Dual electric fan wiring diagram with relay.

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. There are several ways that a dual fan can be wired. It uses a 40 amp electric relay and electric fan sensor. The orange wire from the a c relay goes to the 12 volt of the a c compressor clutch wire.

Here is a picture gallery about dual fan relay wiring diagram complete with the description of the image please find the image you need. Connect yellow and grey wires to ground. Connect the red wire to the sending unit wire of the original fan relay harness. Next splice together both black wires from the relays tab 85 and connect them to the thermostat switch.

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 supplied diagram is both the most reliable and easiest method i ve found. For example dual thermostat switches or dual relays could be used to control each fan separately. The fan will turn on when the a c compressor activates.

And if a relay fails you will still have one fan running. Then connect switched power usually from your ignition switch to the blue wires on both relays tab 86. 86 gray white wire goes to the ignition switch. 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.

However two relays will divide the load. 87 red wire connects to the positive wire on the electric fan. It uses our 40 amp electric relay kit part number 91064044 and electric fan sensor part number 91064013. You could use one relay.