cooling fan now pi$$ing me off!!!

[sps-si]

After a morning of getting covered in other peoples oil i thought i would fit the new blue fan resistor pack thing and stop the 'turbo' speed only fan..... yeah right!
well according to the test procedure i discovered the resistance between the posts was to high so condemed the part. new one on and still no slower fan speeds.
when i bridge the plug off the sensor points 1&3 i get 'turbo' fan
but bridging 2&3 still nothing at all
can someone please advise as i hate electrics and usually avoid them at all costs or make one of the staff do it insted!

free cookies to whoever points me to the problem!!!

[spink]

Could be the switch thats at fault.Although i had the same problem as you, and it was the resistor pack.

After a morning of getting covered in other peoples oil i thought i would fit the new blue fan resistor pack thing and stop the 'turbo' speed only fan..... yeah right!
well according to the test procedure i discovered the resistance between the posts was to high so condemed the part. new one on and still no slower fan speeds.
when i bridge the plug off the sensor points 1&3 i get 'turbo' fan
but bridging 2&3 still nothing at all
can someone please advise as i hate electrics and usually avoid them at all costs or make one of the staff do it insted!

free cookies to whoever points me to the problem!!!

[sps-si]

nope not the switch as i am bridging the plug off the switch and still nothing.
thanks for the thought though.

[Doug_RS2]

I have a vague memory of mucking around with this on my last S2 - Is there not a couple of relays and fuses to check as well?

[S2central.net]

Yes theres two or three relays involved here and its tied up with the A/C wiring as well. I don't have schematics to hand so I'm a bit fooked to comment anymore on the subject, except to suggest you double check that the switches are indeed working and wired as they should be.

Does the car have A/C ?

[sps-si]

no a/c on the shed! i will have a dig round for the relays. what switches and where? as i have pulled the plug off the sender at bottom left of the main rad to try and bridge to get the fan spinning. surly the fan should come on speed 2 when i bridge pins 2 & 3?
i have a live feed on pin 3 and im assuming 1&2 are neg.?
are the relays for the different speeds or just for the overall supply to the fan?

hair is being pulled out now!

[S2central.net]

I need the schematics to steer you round the thing, but I have a nasty feeling, this area is one of those not well covered in the two binders of schematics that I have. My feeling is its in one of the three other schematic binders that I don't have (yet) but Erwin is now complaining some of this documentation is NLA. Audi really sucks sometimes - they aren't looking after us properly

[sps-si]

Audi really sucks sometimes - they aren't looking after us properly

you can say that again! my local audi dealer gives me next to no discount even though im buying parts on almost a daily basis!

i have found 2 relays for rad fan so will have a poke around bridging this and that to see if i can get the lower speed to spin up at all.
if i can't get it working by castle combe then i will be the bloke wondering round in a pi$$ and kicking my car!

[Stick Insect]

There was something on the 20V.org site about fan wiring connecters burning out. Some of the USA CQ20v had this problem. Maybe they could help?

David

[sps-si]

well it would appear whoever had the car before me didn't like the fuse box or relays as they seemed to all be mixed up.
i now have turbo speed and one slightly slower then that.!
is that right for a aby with no a/c or should there be an even slower 3rd speed?

[S2 Ant]

My cooling fan works on turbo speed only, unless i put the aircon on, then it runs at a low speed all the time (for the aircon rad)

Also just turns off with the engine which i thought was weird too as other cars ive had always keep it running after the engine is switched off for a minute or two.

Should it keep on running or stop as it does?

[sps-si]

mine use to keep running or it would switch on by its self after but now like yours it just stops.
but at least i have 2 speeds now so im slightly happier....for now

[martinjs]

It is supposed to carry on running, but most peoples stop when the engine is turned off mine included.

[s2avant]

Mine turns off too. I'm going to do a bit more digging now I've got the after run pump working again. There are (upto) four relays depending on the setup in the car.

One for the after run pump/fan stage 1 and one for each of the fan stages.

Ben

[Doug_RS2]

My fan would stop if I stopped the engine - but it would occasioanlly come on later. Does it not use 2 different temp sensors to operate the fan - one when stopped the other while running? I have done the mod in the water manifold temp sensor - so it always comes on after I stop the car - but I expect there is another sensor still connected that operates the fan when the car is running??