Electrical fan wiring problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Cronus577 · 08-01-2013, 02:35 AM

Hey guys, I just got my first 240 over the weekend and the guy before me wired 3 fans into 1 switch and it's getting extremely hot and im afraid it's going to burn out soon. I was going to run 2 fans on 1 relay and the third on another. Since this is my first wiring gig I was curious if anybody could help me. I drew up how I THINK it should be, but correct me if i'm wrong, I don't want to screw up. I'm running 12 gauge wire on 30a switches.

Rich260z · 08-01-2013, 02:47 AM

You need power to the switches, but yeah the looks like the right idea. I also think the relays are grounded which I can't see either.

Cronus577 · 08-01-2013, 03:04 AM

I keep seeing people interchange 85 and 86 as grounds, As far as what i've been able to read and what you've told me it should look a little bit more like this. Should I put fuses going to the switches as well? Sorry for the crude MSpaint getup

*fliprayzin240sx* · 08-01-2013, 10:34 AM

Why do you need 3 fans?

KiLLeR2001 · 08-01-2013, 10:51 AM

You only need 2 fans and 2 relays. Make sure the source power wire is 12 AWG all the way through, those cheap eBay sockets that plug into bosch style relays are usually only 16 or 18 AWG so you will have issues. Your grounds also need to be 12 AWG or bigger. Since you are tapping directly from battery you will need 30A fuses for each fan relay power source, about 1 foot from the battery.

Cronus577 · 08-01-2013, 01:49 PM

Sweet,when I got the car it came with 3,ill probably take the push fan off and do just the 2 pulling, I have 12 awg wire and 2 30a fuses, 30a switches, and some 30a relays. I'm just trying to get an idea of how to wire this, if anyone can draw sonething out

KiLLeR2001 · 08-01-2013, 08:49 PM

This is as easy as it gets...

Cronus577 · 08-01-2013, 09:38 PM

Quote:

Originally Posted by KiLLeR2001

This is as easy as it gets...

Thank you, that's exactly what I needed!

cotbu · 08-02-2013, 12:08 PM

I don't agree with that diagram! A relay wired like that makes little sense. Will it work???? isn't my question. Why use a relay for that? Is the question.

KiLLeR2001 · 08-02-2013, 12:13 PM

Quote:

Originally Posted by cotbu

I don't agree with that diagram! A relay wired like that makes little sense. Will it work???? isn't my question. Why use a relay for that? Is the question.

Since he has 30A switches he doesn't have to use relays. But me personally, I like to run my accessories (like cooling fans) on relays.

edit:

If you don't want to use relays, and you have a switch that is rated for 30A...

cotbu · 08-02-2013, 12:24 PM

I know, me too.

edit:
That new diagram would be more simple for anyone that needed to wire up fans, that didn't want or understand relays.

08-01-2013, 10:34 AM	#4
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Why do you need 3 fans? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

08-01-2013, 10:51 AM	#5
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	You only need 2 fans and 2 relays. Make sure the source power wire is 12 AWG all the way through, those cheap eBay sockets that plug into bosch style relays are usually only 16 or 18 AWG so you will have issues. Your grounds also need to be 12 AWG or bigger. Since you are tapping directly from battery you will need 30A fuses for each fan relay power source, about 1 foot from the battery. __________________

08-01-2013, 08:49 PM	#7
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	This is as easy as it gets... __________________

08-02-2013, 12:08 PM	#9
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	I don't agree with that diagram! A relay wired like that makes little sense. Will it work???? isn't my question. Why use a relay for that? Is the question. __________________ LoverTechnologies "Half Broken Things!"

08-02-2013, 12:24 PM	#11
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 49 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	I know, me too. edit: That new diagram would be more simple for anyone that needed to wire up fans, that didn't want or understand relays. __________________ LoverTechnologies "Half Broken Things!"

08-01-2013, 02:47 AM	#2
Rich260z Zilvia Addict Join Date: Apr 2011 Location: Burbank, CA Posts: 621 Trader Rating: (8) Feedback Score: 8 reviews	You need power to the switches, but yeah the looks like the right idea. I also think the relays are grounded which I can't see either.

08-01-2013, 01:49 PM	#6
Cronus577 Leaky Injector Join Date: Jul 2013 Location: New Mexico Age: 32 Posts: 138 Trader Rating: (4) Feedback Score: 4 reviews	Sweet,when I got the car it came with 3,ill probably take the push fan off and do just the 2 pulling, I have 12 awg wire and 2 30a fuses, 30a switches, and some 30a relays. I'm just trying to get an idea of how to wire this, if anyone can draw sonething out