Fan wiring
#1
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Fan wiring
OK, I got the FAL fan's in "Istan's" car working. They only have one speed and one power and ground wire each (unlike the factiory fans) so this required a bit of custom wiring. The fans now come on when the A/C is on and/or when the car gets hot. When the car cools off and when the A/C is off, the fans turn off. What I did was this:
On aftermarket fan 1, the power wire should be connected to the blue wire on connector 1 and the red/white wire on connector 2. The ground wire from this fan should be connected to the black wire and the yellow/red wire on connector 2.
On aftermarket fan 2, the power wire should be connected to the black/yellow wire on connector 1 and the white wire on connector 2. The ground wire from this fan should be connected to the black wire and the yellow wire on connector 1.
Here's a preliminary (free hand) wiring diagram. I'll make a neater one when time allows:
On aftermarket fan 1, the power wire should be connected to the blue wire on connector 1 and the red/white wire on connector 2. The ground wire from this fan should be connected to the black wire and the yellow/red wire on connector 2.
On aftermarket fan 2, the power wire should be connected to the black/yellow wire on connector 1 and the white wire on connector 2. The ground wire from this fan should be connected to the black wire and the yellow wire on connector 1.
Here's a preliminary (free hand) wiring diagram. I'll make a neater one when time allows:
#3
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Originally Posted by rcdash
Did you think about having only one of the two fans come on in "low" mode (relay 1) and tie the other fan to relay 2/3 so it only comes on for the "high" mode?
Or are they both pretty quiet anyway...
Or are they both pretty quiet anyway...
#5
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Stan, on the aftermarket fans, you have the R's and B's reversed. Also, on Fan Connector Two, pin 2 should be RW.
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#8
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Originally Posted by rcdash
Or are they both pretty quiet anyway...
The most important part is, the fans are turning on when they are suppose to.
Low or High temps, fans are on.
AC on (regardless of temps), fans are on.
AC off, below low temps, fans are off.
#12
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Originally Posted by istan
I will call my Nissan Mech later today and see if he knows. The fans seem to be working fine still, and in this heat, it's turning on quite frequently.
How soon should I expect to see it not work?
How soon should I expect to see it not work?
It sounds like the relay is strong enough, since it is turning the fan off and on without an issue. But if its marginal, it might just be a matter of time.
If the OEM fan draws 15-17amps each, then we should be perfectly fine. The reason I am asking, becuase we can save all of our customers about $100 in relays and wiring if we can use the stock wiring/relay.
Last edited by Sharif@Forged; 08-08-2007 at 09:49 AM.
#13
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Originally Posted by Sharif@Forged
If the OEM fan draws 15-17amps each, then we should be perfectly fine. The reason I am asking, becuase we can save all of our customers about $100 in relays and wiring if we can use the stock wiring/relay.
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Hi guys,
Bringing this thread back from the dead. I'm in the middle of my install and my wiring doesn't match istans diagram. My wiring from the car goes as follows:
Fan connector 1:
1. Blue 2. light green
3. Yellow 4. Black
Fan connector 2:
1: Blue/white 2. Red
3. Yellow/Red 4. Black
Could anyone please help me match these to istans diagram? I looked in the service manual and don't see any wiring info and I don't have a multimeter on hand!!!
Bringing this thread back from the dead. I'm in the middle of my install and my wiring doesn't match istans diagram. My wiring from the car goes as follows:
Fan connector 1:
1. Blue 2. light green
3. Yellow 4. Black
Fan connector 2:
1: Blue/white 2. Red
3. Yellow/Red 4. Black
Could anyone please help me match these to istans diagram? I looked in the service manual and don't see any wiring info and I don't have a multimeter on hand!!!
#18
hatersgonnahate
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So i did some research. Will be installing a Mizu radiator which provides 2 wire fans. The FSM has some typos in it. Verified with 2006 manual vs 2003.
pins on fan
1 low +
2 high +
3 gnd
4 switched gnd
The OEM fans internally set the speed. Pins 1 and 2 both receive +12v from the same 40A fuse. What I am unsure of is if both pins are hot at the same time or if they are discreet. They are not wired for interlocked operation.
The fans could be wired in parallel 12v to achieve high speed and series 12v to achieve low speed. the wiring should be rated for the fuse size, so minimum 40A.
Running high speed all the time doesnt sound too bad considering i have the Radiator, ac condenser, intercooler, and oil cooler all stacked.
Just wondering why there is a switched ground and a non switched. There are some failsafes built in so that the fans run if the ecu is unplugged i believe. Going to research the FSM some more.
pins on fan
1 low +
2 high +
3 gnd
4 switched gnd
The OEM fans internally set the speed. Pins 1 and 2 both receive +12v from the same 40A fuse. What I am unsure of is if both pins are hot at the same time or if they are discreet. They are not wired for interlocked operation.
The fans could be wired in parallel 12v to achieve high speed and series 12v to achieve low speed. the wiring should be rated for the fuse size, so minimum 40A.
Running high speed all the time doesnt sound too bad considering i have the Radiator, ac condenser, intercooler, and oil cooler all stacked.
Just wondering why there is a switched ground and a non switched. There are some failsafes built in so that the fans run if the ecu is unplugged i believe. Going to research the FSM some more.
#20
hatersgonnahate
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That shouldn't be the case here. With nissan using what looks like electromechanical relays ( their drawings show dry contacts, coils and not transitors) you would not want to do PWM on a motor. The contacts would wear out in no time and lots of noise.