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Windshield Wiper Test 9A - Wipers Run Constantly With Ignition On

NOTE: Perform WINDSHIELD WIPER TEST 1A  before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION in BODY CONTROL COMPUTER INTRODUCTION. Perform TEST VER-1A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Ensure ignition is on and wiper switch is off. Using scan tool, read intermittent wiper voltage. If scan tool displays a voltage of more than 9 volts, go to next step. If scan tool displays a voltage less than 9 volts, go to step 4).
  2. Turn ignition off. Disconnect instrument panel 22-pin connector at BCM. See Figure in CHIME TEST 3A. Ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on instrument panel 22-pin connector terminal No. 1 (Dark Green/Yellow wire). Turn ignition on with engine off. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, replace BCM.
  3. Turn ignition off. Disconnect right multifunction switch 7-pin connector. Using scan tool in voltmeter mode, check voltage on instrument panel 22-pin connector terminal No. 1 (Dark Green/Yellow wire). Turn ignition on with engine off. If voltage is more than 10 volts, repair short to battery voltage on Dark Green/Yellow wire. If voltage is less than 10 volts, replace multifunction switch.
  4. Turn ignition off. Remove intermittent wiper relay and replace original wiper relay with a known good relay. Turn ignition on with engine off. If wipers still run constantly, go to next step. If wipers do not run constantly, replace intermittent wiper relay.
  5. Turn ignition off. Disconnect engine 14-pin connector at BCM. Ensure connector is clean and not damaged. Turn ignition on with engine off. If wipers still run constantly, go to next step. If wipers do not run constantly, replace BCM.
  6. Turn ignition off. Remove substitute intermittent wiper relay. Using scan tool in ohmmeter mode, check resistance of engine 14-pin connector terminal No. 7 (Pink/Violet wire). If resistance is less than 5 ohms, repair short to ground in Pink/Violet wire. If resistance is more than 5 ohms, replace BCM.
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