Question about 1993 Audi 90

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1993 audi 90 s fans do not come on

I can hot wire them . but would like to fix it right

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  • jcraig07 Mar 16, 2009

    The Audi in question had the thermostat missing, at the begining of the winter the customer wanted heat so we put a thermostat in it, we thought that the thermostat was in and just froze open and when we took it apart it didn't have a thermostat at all.  That leads me to believe that there was a fan problem before he bought it and they took the thermostat out to stop it from over heating.  Now I am trying to fix the fans and I was about to pull  them out when I went to unscrew the possitive wires from the buss they were in bad shape.  I have never seen what I believe to be a possitve buss to supply power the fans.  That said I am wondering how to jump the temprature sensor so I can check if the power is getting to the buss and just not to the fans due to a conection problem or if the fans need to be rebuilt still?  Thanks, Josh 



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Timp sensor on engie

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1993 audi 90cs is overheating fast and I don't think the fan is coming on! What do I do?

First of all check the fan fuse to c if it's ok if it is then replace your fan switch on the side of the radiator cause that tells the fan when to come and it's a common fault on most vw cars if all else fails u will need to test and c if the fan is still working,u can check that by either putting direct power to the fans wiring if it does work then change the thermostat

Jun 15, 2015 | 1993 Audi 90

1 Answer

Radiato fan won stop running on a 1993 audi 90 s

I assume from your description that the fan will run until the battery is dead?

Sounds like your fan control relay (underhood, large fuse panel/box) or fan control switch is stuck. Both very simple to replace.

Fan control relay

Fan control switch

I hope this helps

May 06, 2010 | 1993 Audi 90

2 Answers

Need a timing belt diagram for a 1993 audi 90 quattro please hlep

I am not sure if you have the 90 or the 90 Quattro.
Click on the below Links.
The first Link is all the Diagrams on the Timing Belt for the 90 Model.
The second link is all the Diagrams on the Timing Belt for the V8 Quattro.
Before clicking, let me know if this helped you.
For the 90 Model:

For the V8 Quattro:

Jan 31, 2010 | 1993 Audi 90

1 Answer

1991 audi 90 power going to cold start injector (difficulty starting engine when cold or hot)need help. Mister H.

check the ground wire; mounted to the top right side of the intake manifold (four brown wires grouped together)

Dec 01, 2009 | Audi 90 Cars & Trucks

1 Answer


Below is a diagram for your serpentine belt. Please post back with a rating and thank you for using Fixya.


Sep 03, 2009 | 1995 Audi 90

2 Answers

I have hot wired the rad fans to run

If you have hot wired the fans already why not bypass the speed regulator circuit you could add a 3 way inline switch to manually control your fans. Since you have replaced the thermostat, try checking the Rad to see it is circulating properly when engine is cold remove the rad cap start the car and look into the you should be able to tell if it is circulating or not. Have a rad shop test your coolant to make sure you have the needed blend to cool your engine this is normaly done free of charge. Good Luck to you!!

Jul 14, 2009 | 1993 Audi 90

1 Answer

1993 audi 90 CS overheating

be careful overheat expensive dont drive ok let it cool fill with water let idle watch gaugers and if it gets to three quarters on gauge and no fan problem if you have alight let run half hour from cold no fam same look for stuff unpluged let me know

May 27, 2009 | 1993 Audi 90

1 Answer

Bypassing heater core on 1993 audi 90

yes u can bypass the **** core. all you need to do is, take the two hoses going to the heater core, and take em off the heater core, take one hose comply off, and hook the other remaining hose were the other hose was hooked up at.. this will bypass your heater core, but keep in mind you will not have hot air in the cabin of the car..keith...

Mar 14, 2009 | 1993 Audi 90

1 Answer

Why my 1993 audi 90 has no spark???

even if u didnt put it back together with the gears in there proper place u would still have a spark.just not a running motor. I would check for a loose groung wire

Mar 08, 2009 | 1993 Audi 90

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