Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEPOWER WINDOWSSYSTEM TESTSAUTO CLOSING SYSTEM
1998 Audi A4 Avant Quattro, Automatic
Auto Closing System
1998 Audi A4 Avant Quattro, AutomaticSECTION Auto Closing System
NOTE:
All power windows MUST operate when switches are operated manually before proceeding with this test.
- Turn ignition switch off. Remove control module from auxiliary relay panel, located behind left side kick panel. Measure voltage between terminals No. 1 and 2 at relay socket "A". See Figure . If battery voltage does not exist, go to next step. If battery voltage does not exist, repair wiring. See WIRING DIAGRAMS.
- Measure voltage between terminals No. 1 and 2 at relay socket "A". Using key, turn door lock cylinder to unlock position and hold. If battery voltage exists, install power window/sun roof relay control module and go to next step. If battery voltage does not exist, check wiring between lock cylinder and control module. See WIRING DIAGRAMS. If wiring is okay, replace lock cylinder.
- Remove automatic window closing relay. Measure voltage between terminals No. 5 and 8 at relay socket "C". If battery voltage exists, replace automatic window closing relay. If battery voltage does not exist, repair wiring. See WIRING DIAGRAMS.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.