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Home >> Lexus >> 2000 >> LS 400 >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> System Tests >> Wiper Motor Circuit

Wiper Motor Circuit

  1. Disconnect 6-pin wiper motor connector. Turn ignition switch to ON position. Measure voltage between terminal No. 6 (Blue wire) and ground. See WIRING DIAGRAMS . If battery voltage is present, go to next step. If battery voltage is not present, check wire harness, connectors and 20-amp WIPER fuse located in instrument panel junction block, behind left side of instrument panel. Repair or replace as necessary. Retest system operation.
  2. Turn ignition switch to OFF position. Check continuity between terminal No. 1 (White/Black wire) and ground. If continuity exists, check wiper motor. See WIPER MOTOR  under COMPONENT TESTS. Replace wiper motor as necessary. Retest system operation. If continuity does not exist, repair open in White/Black wire between wiper motor and ground connection. Retest system operation.