Tasmaniak
Not a valid input....
- Joined
- Apr 30, 2005
- Messages
- 8,094
- Reaction score
- 131
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- 63
- Age
- 41
- Location
- S.E. Melbourne
- Website
- www.ranjinstallations.com.au
- Members Ride
- VR Stato, C180 Kompressor, Prado and Ka
This is for people who have verified all their fuses and relays and can confirm that the blower motor must've failed
This is not for people who have fans that only work on HIGH... thats another fault. Thats your fan speed resistor pack.
First off, lets confirm the blower has failed. Grab your multimeter, unplug the the 2pin connector (Must be disconnected to test) and check for the reading. Ideally, you need to see below .5Ohms for a satisfactory fan
As you can see in this image, I have 12.5Kohms.. or 12,500 ohms. That resistance is WAY too high and means that something that should be connected is only just making contact.
You need to remove the blower motor... start here https://forums.justcommodores.com.au/threads/vt-blower-fan.1005
Once you have the motor out, you will see two 7mm bolts. Remove them and set them aside.
Remove the lid and the bolts
Now remove the board that sits above the magnets and windings. Be careful as you lift it up as the brushes will shoot forward once removed from the commutator and you may lose the two springs. Flip it over and inspect the brushes and the copper braid from the brushes. As you lift it up, also the tension of the brushes against the commutator and make sure they had a solid pressure.
You can see on mine, the brushes are short but long enough to suffice.
All this crap you see in here is the crap that has come off the brushes over the years as they have worn down. Clean it out with compressed air. I'd suggest using a mask and eyewear as it is metal dust.
Now it wouldn't to verify the continuity between each brush and it corresponding pin in the plug. It should be a dead short (.3ohm or less is satisfactory)
In my instance, one was reading very high resistance. This is NOT ok and will stop the fan from working.
Looking at the side, I found a set of points inbetween the plug and one of the brushes. The points are very similar to the points in a distributor. I seperated them carefully and had a look and sure enough, they were covered in carbon. A quick rub through with a nail file very quickly sorted it out.
Now while it's all apart, clean it up and get the rest of the crap out of it. Clean the commutator with alcohol and a fibreglass pen and the same to contact point of the brushes.
Reassemble the motor and verify the resistance between the two pins in the plug now... .3Ohm... awesome
Test it out back in the car on the low speed (Otherwise it could fly out of your hand with torque and smash the blades
Done! Now save your money for other things... like beer!
This is not for people who have fans that only work on HIGH... thats another fault. Thats your fan speed resistor pack.
First off, lets confirm the blower has failed. Grab your multimeter, unplug the the 2pin connector (Must be disconnected to test) and check for the reading. Ideally, you need to see below .5Ohms for a satisfactory fan
As you can see in this image, I have 12.5Kohms.. or 12,500 ohms. That resistance is WAY too high and means that something that should be connected is only just making contact.
You need to remove the blower motor... start here https://forums.justcommodores.com.au/threads/vt-blower-fan.1005
Once you have the motor out, you will see two 7mm bolts. Remove them and set them aside.
Remove the lid and the bolts
Now remove the board that sits above the magnets and windings. Be careful as you lift it up as the brushes will shoot forward once removed from the commutator and you may lose the two springs. Flip it over and inspect the brushes and the copper braid from the brushes. As you lift it up, also the tension of the brushes against the commutator and make sure they had a solid pressure.
You can see on mine, the brushes are short but long enough to suffice.
All this crap you see in here is the crap that has come off the brushes over the years as they have worn down. Clean it out with compressed air. I'd suggest using a mask and eyewear as it is metal dust.
Now it wouldn't to verify the continuity between each brush and it corresponding pin in the plug. It should be a dead short (.3ohm or less is satisfactory)
In my instance, one was reading very high resistance. This is NOT ok and will stop the fan from working.
Looking at the side, I found a set of points inbetween the plug and one of the brushes. The points are very similar to the points in a distributor. I seperated them carefully and had a look and sure enough, they were covered in carbon. A quick rub through with a nail file very quickly sorted it out.
Now while it's all apart, clean it up and get the rest of the crap out of it. Clean the commutator with alcohol and a fibreglass pen and the same to contact point of the brushes.
Reassemble the motor and verify the resistance between the two pins in the plug now... .3Ohm... awesome
Test it out back in the car on the low speed (Otherwise it could fly out of your hand with torque and smash the blades
Done! Now save your money for other things... like beer!