1993 Audi 90 No heat or window operation

Tiny
TRUEBUDO@YAHOO.COM
  • MEMBER
  • 1993 AUDI 90
  • 6 CYL
  • FWD
  • MANUAL
  • 192,000 MILES
Hi, I'm trying to diagnose my problem.

Neither my heat works or my window or sunroof. The heater fan doesn't even turn on.

Problem is that I have searched for weeks and I cannot seem to find a diagram of where related fuses and relays that could be related to this problem are located on my car.
Other than the heater and the windows/sunroof. The car runs fine with not problems. However, I live in Colorado. And it's cold. My window is stuck down. And I have no heat.

Any help would be appreciated.
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Friday, December 5th, 2008 AT 7:00 PM

4 Replies

Tiny
KHLOW2008
  • EXPERT
Hi truebudo,

Thank you for the donation.

After checking through, the only connection I can find between the blower and power windows is the Load Reduction Relay
Test for power supply to fuse # 17 ( 30A ) and Black/Blue wire to power window control module. If power is not available, the relay is either bad or not being energised when ignition switch is turned ON.


http://www.2carpros.com/forum/automotive_pictures/192750_FuseBox93Audi90c_1.jpg



FUSE PANEL IDENTIFICATION (1990-95)
1 - 15 Amp Foglights (Front & Rear)
2 - 15 Amp Emergency Flasher
3 - 25 Amp (1990-93)
3 - 30 Amp (1994-95) Horn, Stoplights, Seat Heating
4 - 15 Amp Luggage Compartment, Interior & Vanity Mirror Lights, Clock, Socket, Cigarette Lighter, Radio, Climate Control System, Trip Computer
5 - 30 Amp Radiator Fan (High Speed)
6 - 5 Amp Right Side Marker Lights
7 - 5 Amp Left Side Marker Lights
8 - 10 Amp Right High Beam Headlight, High Beam Indicator
9 - 10 Amp Left High Beam Headlight
10 - 10 Amp Right Low Beam Headlight
11 - 10 Amp Left Low Beam Headlight
12 - 15 Amp Combination Instrument, Back-Up Lights, Cruise Control, Anti -Lock Brake System (ABS), Cooling Fan Control Unit, Differential Lock (Quattro models), Auto-Check System, Airbag Warning Light
13 - 15 Amp Fuel Pump
14 - 5 Amp License Plate Light, Engine & Glove Compartments Lights
15 - 25 Amp Windshield Wipers, Turn Signals, A/C, Heated Washer Jets, Radiator Fan Switch
16 - 30 Amp Rear Window Defogger, Heating Mirror
17 - 30 Amp Climate Control System (Blower)
18 - 5 Amp Electric Mirrors
19 - 10 Amp Central Locking System, Heated Door Locks, Anti-Theft Alarm System
20 - 30 Amp Radiator Fan (Low Speed), Radiator Fan Relay
21 - 10 Amp Run-On Pump
22 - Blank
23 - 30 Amp Passenger Seat Adjuster, License Plate Light, Driver's Seat Memory Switch Controls, DRL 24 - Blank (1990-93)
24 - 10 Amp (1994-95) Water Pump
25 - 30 Amp (1990-93) Seat Heating
25 - 5/10 Amp (1994-95) Heated Oxygen Sensor
26 - 5 Amp (1990-93) License Plate Light
26 - 30 Amp (1994-95) Trailer Receptacle
27 - 10 Amp Engine Timing I
28 - 15 Amp Engine Timing II
29 - Spare Fuses Not Used
30 - 5 Amp (1991-95) (Not Shown) Cruise Control (4-Speed Automatic Transmission)
31 - 15 Amp (Not Shown) ABS Cruise Control, Differential Lock
32 - 15/20 Amp (Not Shown) Engine Timing III


http://www.2carpros.com/forum/automotive_pictures/192750_FuseBox93Audi90a_2.jpg



AUXILIARY RELAY PANEL IDENTIFICATION
1 - Relay ABS Combination
2 - Control Unit Seat Belt, Park Light & Radio Warning
3 - Control Unit Interior Light Delay
4 - Control Unit A/C
5 - Blank
6 - Control Unit Oil Pressure Or Front Lamp
7 - Blank
8 - Blank
9 - Circuit Breaker Seats & Windows
10 - Blank
11 - Blank
12 - Blank
13 - Relay Passenger Heated Seat
14 - Relay Driver Heated Seat
15 - Control Unit Power Window
16 - Control Unit Power Window
17 - Blank
18 - Relay Radiator Cooling Fan After Run


http://www.2carpros.com/forum/automotive_pictures/192750_FuseBox93Audi90b_1.jpg

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Saturday, December 6th, 2008 AT 8:50 AM
Tiny
QUEENEE5036
  • MEMBER
I am having basically the same problem with my 1994 audi 90 S. The power windows work once in awhile, but mostly not. I have chwecked fuses, but it does not seem like any are burnt. I was wondering if this guy ever found out exactly what was wrong?
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Friday, May 18th, 2012 AT 10:39 AM
Tiny
WRENCHTECH
  • EXPERT
This question belongs to someone else. Please start a new question of your own.
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Friday, May 18th, 2012 AT 12:40 PM
Tiny
EXOVCDS
  • MEMBER
Wiggle (apply pressure) the ignition switch to see if things come back to life.

Thomas
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Friday, May 18th, 2012 AT 2:34 PM

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