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Home >> Jeep >> 1994 >> Wrangler S, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Self-Diagnostic Tests >> Test 23A - Identifying Intermittent Wiper Problem
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Test 23A - Identifying Intermittent Wiper Problem

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAMS article in this section.
CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
  1. Using DRB, actuate wiper motor. If wipers operate during actuation, go to TEST 23B  . If wipers do not operate during actuation, gain access to Body Control Module (BCM). BCM is located behind center console. Go to next step.
  2. Using DRB in voltmeter mode, backprobe intermittent wiper switch mode sense circuit (Dark Green wire) at Blue BCM connector terminal No. 24. While probe is connected, actuate wiper motor using DRB. If voltage pulsates from more than 10 volts to less than 5 volts, go to step 4). If voltage does not pulsate from more than 10 volts to less than 5 volts, go to next step.
  3. Turn ignition off. Disconnect Blue BCM connector. Turn ignition on. Check voltage on wiper switch mode sense circuit (Dark Green wire) at Blue BCM connector terminal No. 24. If voltage is less than 10 volts, repair open Dark Green wire. Perform TEST VER-1B  . If voltage is more than 10 volts, replace BCM. Perform TEST VER-1B  .
  4. Turn ignition off. Gain access to multifunction switch connector. Disconnect multifunction switch connector. Go to next step.
  5. Turn ignition on. Using DRB in voltmeter mode, backprobe wiper switch mode sense circuit (Dark Green wire) at multifunction switch connector terminal No. 7. Using DRB, actuate wiper motor while observing DRB voltage. If voltage does not pulsate from more than 10 volts to less than 5 volts, repair open Dark Green wire. Perform TEST VER-1B  . If voltage pulsates from more than 10 volts to less than 5 volts, go to next step.
  6. Backprobe wiper switch mode sense circuit (Dark Green wire) at multifunction switch connector terminal No. 8. Using DRB, actuate wiper motor while observing DRB voltage. If voltage does not pulsate from more than 10 volts to less than 5 volts, repair open Dark Green wire. Perform TEST VER-1B  . If voltage pulsates from more than 10 volts to less than 5 volts, replace multifunction switch. Perform TEST VER-1B  .
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