Question about 1993 Audi 90

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Window doesnt work

I am looking at purchasing a 1993 audi 90cs quattro with 200,000 miles. my window problem seems to be similar to those posted except it seems that only one window doesn't work... the rear passenger side.

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You need to take a multimeter to the wires on the motor and if voltage is going to the window motor then you have a bad window motor and it needs to be replaced. I hope that helps you out.

Posted on Nov 19, 2008


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How can i test the Thermostat to my 1993 audi 90cs at home to see if it's good?

I remember doing this years ago. Remove thermostat from the car and drop it into a pot and then pour boiling water over it. If it's good you will see it change shape as the bellows function. If this doesn't happen replace it. Just bear in mind that the Audi can't be driven without a thermostat, so if you have no other transport see if you can buy a replacement thermostat on a sale or return basis!

Jun 16, 2015 | 1993 Audi 90

1 Answer

How can i tell if the thermostat is bad in my 1993 audi 90cs?

faulty thermostats show as two things
stuck close --overheating with in 10 minutes of driving
stuck open--- not reaching operating temperature with in 20 minutes of driving
the test is to remove it have test it as per instructions for testing thermostats

Jun 16, 2015 | 1993 Audi 90

1 Answer

1993 audi 90cs The temp gauge and the oil temp Guage both are blinking and it's over heating within 5 min of driving!the 2nd relay that says "Radiator fan relay" is missing!

Are they blinking from the moment you start or only after it's overheating? Replacing the relay as well as addressing any other obvious stuff would be the first step. Check coolant level and condition, assure the pressure cap is good and there's no leaks.

If you need further help, I’m available over the phone at

Jun 15, 2015 | 1993 Audi 90

1 Answer

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

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

Locate thermostat 1993 90cs v6

Follow the upper and lower radiator hoses to the engine block (upper first). At the end of one of these hoses, there will be a "bubble" housing attached to block -- thermostat is under that.


Aug 23, 2009 | 1993 Audi 90

2 Answers

Climate control won't turn on

check the switch to turn on the air. it might be loose.

Nov 15, 2008 | 1990 Audi V8 Quattro

2 Answers

Windows and power locks does not work.

I would definitely check the fuse panel (left side of the dash next to the driver's door). Inside the panel should be a list of fuse locations and ratings. Do you have an owner's manual? It should have the list, too. If this is not the problem, please post a comment here!

Jul 01, 2008 | 1999 Audi A4

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