| Author |
 Topic  |
|
| |
Current Topic Rating:  | Join the Forum to Rate this Topic at: www.VNCommodore.com Support Forums
|
|
|
Mr Persistant
P Plater
72 Posts
 |
 Posted - 25 Jun 2010 : 5:39:44 PM
|
The A/C blower fan in the evaporator/heater box is only working on the two highest settings: 3 & 4. So it either roars away at the higher settings, or you get nothing on setting 1 & 2.
I pulled the switch out, then carefully disassembled the switch - it's very basic and I couldn't see how it could be causing a problem. Which is good, because GMH don't stock them anymore. 
Then I turned the ignition on, probed the switch plug to find 12V...then bridged with wire from that to each of the four terminals that presumable return power from the switch. Got the same result as using the switch itself > settings 3 & 4 work to produce high fan speed, but nothing on 1 & 2.
My first thought was "Oh Jesus F*^&ing C*%^&$^, I can't face taking out the dash (AGAIN)to replace the blower motor. " ...But then I saw Mechknight's post below about similar issue and reminded me of the resistor issue.
I pray this is my problem.  It seems logical? The resistor is what lowers the Voltage/current to give you the lower fan speeds??? If it blows, you lose the lower fan speeds yet retain 'full-bore' fan power?
Is there a specific test for the resistor? What's the best place to buy one? On a Saturday? It's under that plastic shield just in front of the windscreen with the wiper motors, right? Any further tips? Not terribly intersted in going to the wreckers for same obvious reasons Mechnight gave below.
Thanks in advance. I'm very glad this site is still here to help people! 
|
|
Report to Moderator |
|
|
camo91vp
P Plater
33 Posts
|
Posted - 25 Jun 2010 : 5:47:52 PM
|
| gday, the resistor is under the plastic, carefully prise the cover off then undo the 2 screws take the plastic cap off then undo about 2 more screws disconnect the plug take it out and see if any wires are broken., if so theres your problem. |
Report to Moderator  |
|
|
Mr Persistant
P Plater
72 Posts
|
Posted - 25 Jun 2010 : 5:57:25 PM
|
| Thanks, Camo. So I should be able to see if there are broken wires. Sounds like the multimeter is not even required. I have to put everything back together for now so I can go out in 90mins time, but will check it out when I get back. |
| Report to Moderator |
|
|
VNSVLE
Forum Moderator
1316 Posts
|
Posted - 25 Jun 2010 : 7:52:43 PM
|
Nope you are right no meter required. I would recommend getting a solid state fan speed resistor to replace your broken wire coil resistor.
Cheers |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
| Report to Moderator |
|
|
Mr Persistant
P Plater
72 Posts
|
Posted - 26 Jun 2010 : 09:16:19 AM
|
Solid State...Mmmmm, I like the sound of that.
Is that going to be a custom job or can you buy something that connect straight onto everything?
Should I try an auto electrical business or a Repco? I'll try both in the next hour or so.
|
| Report to Moderator |
|
|
VNSVLE
Forum Moderator
1316 Posts
|
Posted - 26 Jun 2010 : 10:08:55 AM
|
| They are a direct replacement. I cant remember exactly what model they came off but I believe I got mine from a VP SS. If you have any drama's I can get some pictures for you so you know what you are looking for at the wreckers. If you do go searching through the wreckers though look for one that has like a heat sink instead of the wire coils. |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
Edited by - VNSVLE on 26 Jun 2010 10:15:09 AM |
| Report to Moderator |
|
|
Mechknight73
National Driver
1001 Posts
|
Posted - 26 Jun 2010 : 11:12:37 AM
|
| I recently replaced mine. It will cost you about $65 for a solid state one (which is all the dealers sell now) but have yet to check if anyone else sells them. If it's an old resistor module, the coils look like giant lightbulb filaments, and it's really obvious if any of them are blown. Even if it doesn't cure the problem, it's good to upgrade this part anyway |
| Report to Moderator |
|
|
Mr Persistant
P Plater
72 Posts
|
Posted - 26 Jun 2010 : 1:20:38 PM
|
| Thanks guys. I'm going to call Holden parts dealer on Monday. I agree with Mechknight that you should replace this item with the updated version even if it's not yet failed. I'm pretty confident this is my problem, though. I'm just relieved it's relatively small expense and effort involved. |
| Report to Moderator |
|
|
Mechknight73
National Driver
1001 Posts
|
Posted - 26 Jun 2010 : 5:11:00 PM
|
| I'd ask places like Autopro if they can get one, but Holden dealers definitely have them. When you take off the plastic cover (between the windscreen and the firewall) take the whole panel off. Remove the wiper arms, carefully undo all the retaining clips, and gently prise it off. These things can be brittle, and have been known to break if you try to "lift it out of the way" like I did. But the module is sealed under a cap with a rubber gasket around it, so there's no real problem about water getting into it |
| Report to Moderator |
|
|
Mr Persistant
P Plater
72 Posts
|
Posted - 26 Jun 2010 : 5:49:39 PM
|
Appreciate the tips. I've actually had the cover off before when I replaced the evaporator and I recall noticing the resistor at the time.
There's none of those major auto retailers close to me. I'd burn more fuel than any price difference between them and local Holden parts distributor, which is only about 3km and one set of lights away. That's VERY handy.  They aren't real cheap, I know, but the service is pretty good at the local Holden parts dealer....that's when they aren't telling me they don't stock parts for the 'old' VN anymore. |
| Report to Moderator |
|
|
Mechknight73
National Driver
1001 Posts
|
Posted - 26 Jun 2010 : 11:30:19 PM
|
| Interesting you should say that. Holden has an agreement with Rare Spares now; they do a lot of reproduction parts for models up the the VS Commodore. The site address I've written here before, under "rare Spares." They don't sell everything, but they sell enough parts to do most of a restoration |
| Report to Moderator |
|
| |
Topic |
|
Topic Locked
