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All Models

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1989 Audi 90, 1989 Audi 80, 1989 Audi 200, 1989 Audi 100, and 1988 Audi 90. However, it is still accessible from the selected car via links, so may be relevant.
  1. Item Being Tested - Anti-Lock Power Supply Relay Place ABS tester in program switch position No. 5. Turn ignition off. Disconnect plug for anti-lock brake tester from ABS control unit.
  2. Remove anti-lock power supply relay from auxiliary relay panel. Use ABS tester adapter to connect anti-lock power supply relay from vehicle to back of ABS tester. See Figure .
  3. Install a new Anti-Lock Power Supply Relay (443 927 826) in auxiliary relay panel. Turn ignition on. When button No. 5 lights up, press button.
  4. Lamps No. 1 and 3 (Green) must come on. If lamps come on, TEST 5 is completed. If lamp No. 4 (Red) comes on, repeat steps 1) through 3). If lamp No. 4 comes on again, replace anti-lock power supply relay.
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