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Test 23A - Diagnosing Washer Pump Problem

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Perform TEST VER - 1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Disconnect washer pump motor connector. Using DRB-II in voltmeter mode, probe washer pump switched ignition feed circuit at washer pump connector (Brown wire).
  2. With probe connected, engage washers. If voltage is more than 10 volts while engaging switch, go to step 4). If voltage is less than 10 volts while engaging switch, measure voltage of switched ignition feed circuit at multifunction switch connector terminal No. 3 (Brown wire).
  3. With probe connected, engage washers. If voltage is more than 10 volts while engaging switch, repair open Brown wire. If voltage is less than 10 volts while engaging switch, replace multifunction switch.
  4. Turn ignition off. Using DRB-II in ohmmeter mode, measure resistance of washer pump motor system ground at washer pump connector (Black wire). If resistance is more than 5 ohms, repair open in Black wire. If resistance is less than 5 ohms, replace washer pump motor.
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