Author Topic: Wiring dual fans  (Read 2914 times)

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Offline Wyattboche

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Wiring dual fans
« on: July 19, 2011, 02:58:02 AM »
I bought 2-7" electric 12volt fans. Does someone have a wiring diagram on how to wire up dual fans with relay? Thanks

Offline fastcorvairs

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Re: Wiring dual fans
« Reply #1 on: July 19, 2011, 06:06:52 AM »
One relay per fan.  Standered auto parts relays will have a diagram on the box. 

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Offline fabr

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Re: Wiring dual fans
« Reply #2 on: July 19, 2011, 06:09:43 AM »
2-7" fans will run fine on one relay unless he wants to control each separately.
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but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
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Offline fastcorvairs

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Re: Wiring dual fans
« Reply #3 on: July 19, 2011, 06:11:44 AM »
One realy goes bad you aint got nothing.   Use two and if one burns up you got one fan to get you back. 

If I believe I cannot do something it makes me incapable of doing it. But when I believe that I can, then I acquire the ability to do it , even if I didn't have it at the beginning.

Offline fabr

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Re: Wiring dual fans
« Reply #4 on: July 19, 2011, 06:59:59 AM »
True but if my relay goes bad I'll bypass it  in an emergency. The ONLY reason I suggest he use just one relay is that on a MC engine buggy we are relying on the paltry amps available. Another amp for a relay is just another amp not available for lighting and other accessories. I agree that with a capable charging system the dual relays are best. Redundancy is a GOOD thing off road.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Wiring dual fans
« Reply #5 on: July 19, 2011, 07:00:51 AM »
One realy goes bad you aint got nothing.   Use two and if one burns up you got one fan to get you back.
If one relay goes bad you can jumper the second fan into the good relay and run both also.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Nutz4sand

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Re: Wiring dual fans
« Reply #6 on: July 19, 2011, 09:42:48 AM »
Carry a spare relay??  ;)
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Offline Carlriddle

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Re: Wiring dual fans
« Reply #7 on: July 19, 2011, 10:12:40 AM »
Keep relay and wiring within specs on amp draw, you shouldn't be popin nothing.
You can keep your CHANGE, I'd like to keep my DOLLAR.

Offline Wyattboche

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Re: Wiring dual fans
« Reply #8 on: July 19, 2011, 11:27:41 AM »
2-7" fans will run fine on one relay unless he wants to control each separately.
There going on a tranny cooler. Would I need to run both or can I get away running one?Also what size fuse should I use as the main for both fans?
« Last Edit: July 19, 2011, 11:29:56 AM by Wyattboche »

Offline Carlriddle

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Re: Wiring dual fans
« Reply #9 on: July 19, 2011, 01:14:25 PM »
Depends on how many watts they draw.  watts/12v=amp  Ex 50w/12v=4.15amp  So a 5amp fuse. 

You could have ea come on at diff temp, one a little higher than other.  If you put them on seperate relays, I'd put on a seperate fuse. (for same reasons)
You can keep your CHANGE, I'd like to keep my DOLLAR.

 

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