How To Wire Up A Relay For Electric Fan

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

How to wire up a relay for electric fan. That doesn t seem right. Wiring a electric fan with a relay i am getting ready to wire my electric fans and did some searching and found this thread. While you could just wire the electric fan to run all the time hooking it up with an electric fan relay kit that is temperature controlled or to use the fancy term for it thermostatically. Use these for access into the cabin.

This way even if the thermostat is not hot enough for the fans to come on the ac clutch will override this and turn the fans on. Every circuit added to a modern car should be run through an automotive relay. Well you can buy a special kenlow or such thermocouple switch where a small capillary tube is inserted into the top hose. Compressor via a 3 rd store bought relay.

And if a relay fails you will still have one fan running. It shows the dash switch relay terminal 85 to 87. It uses a 40 amp electric relay and electric fan sensor. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method.

Using a relay can also shorten the distance. There are a number of problems that arise 1st what do we use to switch the fan. Page 4 optional relay overrides temp sensor and turns on fans when a c is turned on battery 86 30 87 85 86 30 87 85 optional override switch turns on fan by passing temp sensor and a c relay. How to wire up an electric fan.

The factory wiring in modern cars is light gauge and is not designed for additional loads. Attach the wire to the relay terminal opposite the battery terminal. The first part of the installation is to install the electric fan to your radiator and remove the mechanical fan. A relay kit our part number ccfkrl will include everything you need to properly wire up your electric cooling fans with the exception of additional wiring needed to complete all of the circuits.

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. A lot of people are now fitting electric fans to their kit cars often because they have had to relocate the radiator away from the normal viscous fan. I want to wire it like post 11 diagram 2. A relay can be used to power a new circuit with very little added current draw on the original wiring.

This relay will have 2 wires going to ground our grey wire and an additional wire going from the relay to the green wire by the ac compressor. Route the 16 guage wire up the fenderwell and through the firewall to just below the dash. I would think 85 would be connected to 30.