Auxiliary Fan Install (2 Viewers)

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here is the fan its a denso
fjfan.JPG
fjfan2.JPG
 
and heres the relay that was previously installe,d (im guessing it was a t stat controlled install) With this fan can I still run battry(w fuse) hot to switch then switch to fan and neg fan back to neg battery or should I keep the relay in the mix)
auxrelay.JPG
auxrelay1.JPG
 
and heres the relay that was previously installe,d (im guessing it was a t stat controlled install) With this fan can I still run battry(w fuse) hot to switch then switch to fan and neg fan back to neg battery or should I keep the relay in the mix) View attachment 1443400 View attachment 1443401

Pictured is a 20amp auto reset breaker not a relay. Using the diagram I made install the breaker where I have the fuse and wiring per diagram. The switch has a rating of 21amp so you do not need a relay. Use 14ga wiring at a minimum. Not the bat. terminal on breaker this is important not to reverse.
 
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Pictured is a 20amp auto reset breaker not a relay. Using the diagram I made install the breaker where I have the fuse and wiring per diagram. The switch has a rating of 21amp so you do not need a relay. Use 14ga wiring at a minimum. Not the bat. terminal on breaker this is important not to reverse.
YOUR THE MAN AMONG MEN, OR A LIFESAVER SO TO SPEAK.
 
Ok the aux fan is set, I got rid of the auto reset breaker, and simply pulled from pos(battery) with a fuse right after to switch and it works perfect. thanks for all the help. a lifesaver. Id say.
 
Ok the aux fan is set, I got rid of the auto reset breaker, and simply pulled from pos(battery) with a fuse right after to switch and it works perfect. thanks for all the help. a lifesaver. Id say.

If I understand your wiring scheme correctly, I see one potential problem.

First, to clarify I'm seeing this in my mind the way you have it wired -

I believe you're stating your HOT wire goes from the battery to the switch, THEN from the switch to an inline fuse, then to the positive on the fan.

Am I correct?

If so, you've got your fuse in the wrong location.

The purpose of the fuse is to break the HOT connection in the event of a short or other over amperage draw.

The way you have it wired, the fan itself is protected; but the switch and preceding wiring from the battery are NOT. Should you have a short between the battery & the switch, you could cook the switch, melt the wire, or even possibly start an electrical fire. (For example, while wheeling, that wire rubs on some bracket under the hood or dash & wears through the insulation - SHORT)

You'll want to locate that fuse as close to the battery as possible. This way, if the above SHORT occurs, the fuse blows & cuts the power.

Additionally, the benefit of the self resetting circuit breaker you previously had would be not needing to source a replacement fuse on the trail, should the afformentioned SHORT occur. Once the issue is corrected, the breaker resets itself & power is restored.
 
If I understand your wiring scheme correctly, I see one potential problem.

First, to clarify I'm seeing this in my mind the way you have it wired -

I believe you're stating your HOT wire goes from the battery to the switch, THEN from the switch to an inline fuse, then to the positive on the fan.

Am I correct?

If so, you've got your fuse in the wrong location.

The purpose of the fuse is to break the HOT connection in the event of a short or other over amperage draw.

The way you have it wired, the fan itself is protected; but the switch and preceding wiring from the battery are NOT. Should you have a short between the battery & the switch, you could cook the switch, melt the wire, or even possibly start an electrical fire. (For example, while wheeling, that wire rubs on some bracket under the hood or dash & wears through the insulation - SHORT)

You'll want to locate that fuse as close to the battery as possible. This way, if the above SHORT occurs, the fuse blows & cuts the power.

Additionally, the benefit of the self resetting circuit breaker you previously had would be not needing to source a replacement fuse on the trail, should the afformentioned SHORT occur. Once the issue is corrected, the breaker resets itself & power is restored.
I have the fused line from battery to the switch then pos from swith to fan switch is grounded to underhood firewall and the fan in has pos in from switch and tied on neg side to neg battery
 
I have the fused line from battery to the switch then pos from swith to fan switch is grounded to underhood firewall and the fan in has pos in from switch and tied on neg side to neg battery

OK, my mistake. Maybe it was the late hour, but I swear I read that as "with a fuse right after the switch..."

I re-read your post & see that I was incorrect in my understanding.
 
Not a prob at all. It all works the only slight issue I see is the switch light seems to stay on even when not flipped to on position.
TO BE CRYSTAL CLEAR Im fused(close to battery) to switch then hot from switch to fan. switch is grounded within 3 ft to firewall, and finally neg from battery is st8 to neg battery post.
 
If your switch light is staying on all the time, rather than turning on & off with the fan; you likely have the 12v + in & out reversed. Try flip flopping the power wires at the switch & see if that makes a difference.
 
If your switch light is staying on all the time, rather than turning on & off with the fan; you likely have the 12v + in & out reversed. Try flip flopping the power wires at the switch & see if that makes a difference.

The wiring diagram showing the back of the switch might help also

aux-fan-wiring-png.1324799


Using the parts included in the wiring kit I picked up battery power out of the factory under hood fuse box and stored the fuse inside out of sight for a cleaner install.
Taped a spare 7amp fuse to the fuse holder.

IMG_8828[1].JPG
 
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I have a question that I was wondering about on this fan...... is this fan (100 series....correct?) considered a "pusher"? I have always been confused on which side of the radiator a pusher, or a puller are mounted. Thank you for your time!
 
I have a question that I was wondering about on this fan...... is this fan (100 series....correct?) considered a "pusher"? I have always been confused on which side of the radiator a pusher, or a puller are mounted. Thank you for your time!
I have mine on the "outside" and have reversed the polarity so the fan in between the grille and mounted on radiator and I have it spinning counterclockwise. maybe that helps?
 
If your switch light is staying on all the time, rather than turning on & off with the fan; you likely have the 12v + in & out reversed. Try flip flopping the power wires at the switch & see if that makes a difference.
Exactly what I did, lol
 
I have a question that I was wondering about on this fan...... is this fan (100 series....correct?) considered a "pusher"? I have always been confused on which side of the radiator a pusher, or a puller are mounted. Thank you for your time!

Yes it is an aftermarket 100 series fan and it set up as a pusher but can be reversed. It mounts in front of the radiator but does not touch the radiator for a trouble free installation.

See several install pics at the start of this thread
 
I have mine on the "outside" and have reversed the polarity so the fan in between the grille and mounted on radiator and I have it spinning counterclockwise. maybe that helps?

Thank you for the reply. My question to you would be.... if you have yours spinning counter-clockwise, in front of your radiator, wouldn't that mean yours is "pulling"? Does your set up help quite a bit? Knock-on-wood, mine isn't getting above 1/2 way on the stock gauge (verified with hand held temp sensor) but I want to stay "in front of the game". Thanks again!
 
Thank you for the reply. My question to you would be.... if you have yours spinning counter-clockwise, in front of your radiator, wouldn't that mean yours is "pulling"? Does your set up help quite a bit? Knock-on-wood, mine isn't getting above 1/2 way on the stock gauge (verified with hand held temp sensor) but I want to stay "in front of the game". Thanks again!
I just rewired it, with help from Landcruiserphil, Im testing to see what rotation works the best. currently Im thinking I have it reversed and its wrong. But it has been hot enough to check with the autoguage
 
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Simpler wiring for the electrically challenged for 2018 :)

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