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Fan speeds gone except high (4)

16K views 16 replies 11 participants last post by  Patrol Two  
#1 ·
Last weekend when it started warming up a bit I was using my air con. Now I'm not sure when I lost them, but the only speed I can select now is 4(flatout). The air con turns on for all other speed settings, just no fan. Have checked loom and I have power to all. So I ran a hot wire from the power at the switch end straight the plug at the fan and it still only works on 4. Is my fan stuffed or is it something simple.
Its a GU.
 
#2 ·
There's a resistor on the passengers side that slows the fan on the lower speeds. It's bypassed on full speed - that's why it works only on the highest speed. You'll find it by looking at the aircon ducting - under the dash above the passengers footwell. You'll see some wires going to the resistor unit that's housed "inside" the duct. Not sure how much Ni$$an wants for it but it's a fairly common problem. Luckily it's easily fixed.

Greg
 
#3 ·
There's a resistor on the passengers side that slows the fan on the lower speeds. It's bypassed on full speed - that's why it works only on the highest speed. You'll find it by looking at the aircon ducting - under the dash above the passengers footwell. You'll see some wires going to the resistor unit that's housed "inside" the duct. Not sure how much Ni$$an wants for it but it's a fairly common problem. Luckily it's easily fixed.

Greg
x2.........PM nizzbits for a price, remoove the resitor first and check it with a multimeter.
 
#5 ·
The resistor pack is like a circuit board that slots into the plastic fan housing. Two screws hold it in and there is a large pluge going to it. The tracks act as the resistance to slow the fan down. A part of the track goes open when you loose the first 3 speeds as it is like a fuseable link.

Mine went when I was at Archer River (Cape York) in 2007 and I manages to repair it with a soldering iron and solder. Was a b!tch to get it to solder as it is like a carbon based track. Turned out OK and still goes well to this day.

Regards
David
 
#6 ·
The resistor pack is like a circuit board that slots into the plastic fan housing. Two screws hold it in and there is a large pluge going to it. The tracks act as the resistance to slow the fan down. A part of the track goes open when you loose the first 3 speeds as it is like a fuseable link.

Mine went when I was at Archer River (Cape York) in 2007 and I manages to repair it with a soldering iron and solder. Was a b!tch to get it to solder as it is like a carbon based track. Turned out OK and still goes well to this day.

Regards
David
Good info Dave
 
#12 ·
All,

ive just completed this fix on my GU and thought id post up some photos to show how easy it is.

Remove ~8 screws from around the glovebox and remove the glovebox.
then disconnect the plug for the fan resistor
then remove 2 screws and pull the resistor out of the fan module.
photo of location of resistor


then on the resistor check to see if there is a circuit between the right pin and any of the other pins (as shown below). If yours is like mine there is no circuit and the fusible link would be corroded.
Carefully scrape away the dark coloured coating till you get to shiny metal either side of where the fusible link should be and solder a piece of wire across the gap.
Then check if the fan works.
Note that the resistor gets cooled by the fan when its installed in the car, so either only turn the fan of for 5 second max or completely install the resistor in the fan module before testing. Otherwise you could overheat the resistor.


Steve
 
#15 ·
All,

ive just completed this fix on my GU and thought id post up some photos to show how easy it is.

Remove ~8 screws from around the glovebox and remove the glovebox.
then disconnect the plug for the fan resistor
then remove 2 screws and pull the resistor out of the fan module.
photo of location of resistor


then on the resistor check to see if there is a circuit between the right pin and any of the other pins (as shown below). If yours is like mine there is no circuit and the fusible link would be corroded.
Carefully scrape away the dark coloured coating till you get to shiny metal either side of where the fusible link should be and solder a piece of wire across the gap.
Then check if the fan works.
Note that the resistor gets cooled by the fan when its installed in the car, so either only turn the fan of for 5 second max or completely install the resistor in the fan module before testing. Otherwise you could overheat the resistor.


Steve
10 years on and this post is still relevant.
Im gonna try this as I have the same problem!

Thanks!
 
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#17 · (Edited)
Yessss!
Such a simple fix and it saved me $$$$.

So easy that I made a video of how I did it. Do not ingnore the blatant plug I give my self in the video!

Thanks for the help guys!
 
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