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PostPosted: Fri Jan 19, 2018 3:05 pm 
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Joined: Wed Jan 17, 2018 3:29 pm
Posts: 4
Car Model: Saab 9-5 Aero Estate 2001
Hey there,

Hoping you can maybe help,

Picked up one of the above for literally pennies, looks very very clean, will be putting through an MOT, and looks like it will need Front Bottom Arms, Not the issue, that's easy enough.

The problem being The Heater Blower.

I have stripped the scuttle panel down and took the Blower out, moves freely enough, and put 12v over it from a battery and hey presto it spins freely. But when it is plugged in nothing. I have put a multi meter on the plug and getting voltage through that - Would I still get voltage if the resistor has went? or even if the a fuse has went or a relay? Anyway to test for this before I strip the relay out?

Hoping someone can shed some light or had the same issue (I know it seems fairly common) but still getting voltage up to plug, and the motor actually works.

Will get some pics up when the weather improves.

Ian


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PostPosted: Sat Jan 20, 2018 4:24 pm 
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Saab Nut

Joined: Tue Mar 25, 2014 5:41 pm
Posts: 1080
Location: Kippen STIRLING
Car Model: 9-5 Aero Sportwagen and more
Ian,

Does it have ACC. If so then the 'chip' in the unit regulates the motor speed.

Paul @ Kippen


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PostPosted: Sat Jan 20, 2018 8:19 pm 
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Luger Lout
User avatar

Joined: Tue Dec 23, 2008 6:00 pm
Posts: 20989
Location: Swindon
Car Model: Estella. 2008 Manual 9-5 D
The bushes wear out. They are a stoopid off limit size.

Don't ask me how I know this. I do have a blower motor with the correct bushes soldered in by JamSaab though! :D

_________________
Si.

Dancing on a Highway Somewhere..


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PostPosted: Sat Jan 20, 2018 9:13 pm 
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Saab Nut
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Joined: Sat Jan 18, 2014 3:23 pm
Posts: 1359
Location: Sussex
Car Model: '04 9-5 Aero est., '97 9K Aero
hello IanR83,

when you say you get current to the plug, do you mean the connector supplying the fan? The one on the driver's side of the the fan housing under the scuttle cover?

If you do decide to change the resistor/ballast, I'll talk you through how I did it if you like. Taking out the whole loom is laborious as it goes from one footwell, through the firewall, across the fan compartment then back inside the car in the opposite footwell. The 2006> version was more sensible.

The ballasts are a known issue with 9-5s (and the original 9-3s). The usual symptom in 9-5s, as addressed by a Saab Tech Service Bulletin, is that they start to make a droning / moaning sound at speeds 4 to 7 inclusive, although they still control the fan speed correctly. I'd like to know why you're getting current to the fan connector but it doesn't spin when connected.

cardboardcutout


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PostPosted: Thu Jan 25, 2018 12:02 pm 
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Joined: Wed Jan 17, 2018 3:29 pm
Posts: 4
Car Model: Saab 9-5 Aero Estate 2001
Hi All Thanks for the replies,

I think I read somewhere that the fan motor plug is the live side so has power there - showing between 11-12v when wiggling the ground. As for the actual blower unit, this works and not the bushes on the unit - tested of a battery and spins away.

So it makes me think that it is the Heat resistor - hopefully it is this, I have stripped it all out today so not an issue there, just awaiting on another resistor coming and will try this, if not I have no idea what the next step will be. Would the actual control unit in the cab be at fault? I have checked the 40amp fuse and he is good. As I said the car has been lying a while I believe and I managed to get it for Pennies, so just going to sort it all out if possible.

Aslo would anyone know how to diagnose a faulty Heat Resistor? just so I can go through it with a multi meter and see if anything is away, opend it up and all the solder joints look ok.


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