electric fan relay

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rhythmicnoise

Member - Posts: 19

Joined: July 13, 2007

Location: Indiana, United States

Posted: October 09, 2011 at 8:38 AM / IP Logged

I'm putting an electric fan in my 90 RX-7. It's using a thermoswitch as well as a manual override switch. Is this diagram correct?

1989 Mazda RX-7 vert-JDM swapped engine

Eclipse CD5425

Boston Pro 6.5 comps in doors

Boston Pro 5" mids in the dash

Boston Pro 8"

JL Audio 300/2

Zapco Studio 150

Alpine 4ch amp that came with t

i am an idiot

Platinum - Posts: 13,670

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 09, 2011 at 9:33 AM / IP Logged

If you are sure about pin 10 of the ECU, all looks good.

rhythmicnoise

Member - Posts: 19

Joined: July 13, 2007

Location: Indiana, United States

Posted: October 09, 2011 at 9:41 AM / IP Logged

I actually haven't wired in the idle up yet. It's a fresh rebuilt engine with a drivetrain swap, aftermarket gauges, efan, etc. Once everything is up and running I'll go back and splice in the idle up.

1989 Mazda RX-7 vert-JDM swapped engine

Eclipse CD5425

Boston Pro 6.5 comps in doors

Boston Pro 5" mids in the dash

Boston Pro 8"

JL Audio 300/2

Zapco Studio 150

Alpine 4ch amp that came with t

bluesplyr

Member - Posts: 4

Joined: September 14, 2012

Location: Florida, United States

Posted: September 14, 2012 at 6:49 PM / IP Logged

My first post...hope its not my last :-)

I would like to do the same to my 250cc scooter, but would like to wire it hot with 12V power from battery to pin 85, bypassing ignition switch. My concern is: would this cause a drain on my battery as coil would always be energized.

i am an idiot

Platinum - Posts: 13,670

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 14, 2012 at 8:20 PM / IP Logged

If 12 volts is on 85, and ground is on 86, then yes this will drain your battery. What kind of powerplant do you have on that beast that requires cooling when the key is off?

bluesplyr

Member - Posts: 4

Joined: September 14, 2012

Location: Florida, United States

Posted: September 14, 2012 at 8:36 PM / IP Logged

Mr. Platinum,

Powerplant is stock 260cc, but made in another country beginning with C. I would like to have the option of turning on fan if necessary, although i've not had any problem so far with overheating. electric fan relay -- posted image. I have all the wiring, 12 gauge, in place and trying to avoid fishing wire to ignition. Is my only solution connecting to ignition which i'm trying to avoid...not a kid anymore. Also, should I use the hookup posted by rythm.

i am an idiot

Platinum - Posts: 13,670

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 14, 2012 at 9:15 PM / IP Logged

Yes you can use his diagram. If the switch is in the off position, it will not be draining your battery.

i am an idiot

Platinum - Posts: 13,670

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 14, 2012 at 9:54 PM / IP Logged

If you do not want to go to the ignition switch, you could always go to the tail light for switched power.

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: September 14, 2012 at 11:17 PM / IP Logged

bluesplyr - if your GND is thru a temperature switch (as per rhythmicnoise's diagram) then the relay won't be energised at low temperature.

bluesplyr

Member - Posts: 4

Joined: September 14, 2012

Location: Florida, United States

Posted: September 17, 2012 at 3:06 PM / IP Logged

Before you tell me how wrong I am, I want to thank everyone for their superb advice.

Now, if I apply 12V to lead 85 with 86 on a spst switch before connection to - side of thermoswitch.... will I accomplish what is needed. I only want this fan switch in an emergency, if for any reason i'm caught in the Outback on a hot summer day...r electric fan relay -- posted image. estaurant that is...:-)

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