Mechanics

NO HEAT OR WINDOW OPERATION

1993 Audi 90

Heater problem
1993 Audi 90 6 cyl Front Wheel Drive Manual 192000 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.
AD
Avatar
Truebudo@yahoo.com
December 5, 2008.



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


KHLow2008
Dec 6, 2008.
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?

Tiny
Queenee5036
May 18, 2012.
This question belongs to someone else. Please start a new question of your own.
AD

Wrenchtech
May 18, 2012.
Wiggle (apply pressure) the ignition switch to see if things come back to life.

Thomas

Tiny
Exovcds
May 18, 2012.

AD