Cooling Fan Switch Wiring Diagram

This was a mediocre way of doing things primarily because the current required to spin the fan was drawn through the switch itself. Suggested electric fan wiring diagrams suggested primary cooling fan single speed onoff using 12 volt switching devices only for primary activation note. Relays shown in these diagrams can provide options for useful features such as an ac override on andor.
cooling fan switch wiring diagram

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This will be the wire that connects your switch to your fan power wire.

Cooling fan switch wiring diagram. The fan control switch usually connects to the black wire and the light kit switch to the red wire of the 3 way cable. The parts in red are what youre adding to make this work. Line voltage enters the switch outlet box and the line wire connects to each switch. Most stand alone adjustable thermostats ie.

The parts in black are the stock wiring for the cooling fan. I have had a lot of people ask me about gm radiator cooling fan diagnosis in the past. It uses a 40 amp electric relay and. In this diagram the black wire of the.

A couple of decades ago it was popular to simply add a switch under the dash to control an electric cooling fan often referred to as an auxiliary fan. It basically runs two fans in series for low speed and then puts each on its own 12v circuit for high speed. At the end of the power wire and the end of the firewall wire put a butt connection. Httpsamznto377klrp those fans fit perfect on 68 72 gm a body cars bu.

Here youll also be exposed to the current path voltage and sensor signal. The cooling fan wiring diagram below is what weve found to be the simplest and most reliable method. Just an idea on how to wire up electric cooling fans for your vehicle cooling fans. So now we have a wire that goes through the engine bay to the cabin of your car.

For those of you that know how to read a circuit diagram this should be all you need to know. Or a single relay could be used to control both fans. Cooling fans are now controlled by the ecm through the respective module network and using duty cycle control signals. For example dual thermostat switches or dual relays could be used to control each fan separately.

Now take the power wire from your fan and connect it to the wire that is going through the firewall. We will be using a butt connection to fuse these together. This is the diagram for what were doing here. There are several ways that a dual fan can be wired.

In electrical terms thats a no no. You should never rely on a switch on the dash to handle the kind of. Hayden flex a lite or perma cool brands can provide a 12 volt output when activated. Switched lines and neutral connect to a 3 wire cable that travels to the lightfan outlet box in the ceiling.

Ceiling fan switch wiring diagram 2. Make sure you get the right green wire and go make it happen.