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  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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