wiring 2 radiator fans

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don2rz

Member - Posts: 11

Joined: March 31, 2011

Location: California, United States

Posted: April 17, 2012 at 5:22 PM / IP Logged

Is it safe to wire 2 radiator fans like this:

* the fans were taken from a 2000 Acura Integra

* standard automotive 30A relay

* oem Toyota Tacoma switch

What wire guage should I use?

i am an idiot

Platinum - Posts: 13,673

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: April 17, 2012 at 9:27 PM / IP Logged

How big are the fans? Do you have any idea of their current draw at startup?

I would use one relay per fan, and delay one of the relays in order to not be so taxing on your charging system.

don2rz

Member - Posts: 11

Joined: March 31, 2011

Location: California, United States

Posted: April 17, 2012 at 10:11 PM / IP Logged

The fans are 12" and 11".

I don't know their current draw, been searching this afternoon for more

info about the fan specs but wasn't successful.

I like the idea of using one relay per fan, but would like to use just

one switch to power both relays. How can I wire it this way? What wire

guage should I use?

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: April 19, 2012 at 3:15 AM / IP Logged

I'd run 2 x 40 amp relays with about 50 -60 amp fuses, use the top diagram with one relay per each fan.

Somewhere in there should also be a thermal (automatic temp switch) and an AC derived switch.

Oh look I've just eliminated your need for a fan switch.

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wiring 2 radiator fans

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