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Test 79B - Inoperative Washer Fluid Lamp

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see appropriate article in ENGINE PERFORMANCE:
  1. Using scan tool, actuate low washer fluid lamp. If low washer fluid lamp toggles on then off, go to step 6). If low washer fluid lamp does not toggle on then off, go to next step.
  2. Using scan tool, stop low washer fluid lamp actuation. Disconnect message center connector. Connector is located under left side of dash, near instrument cluster connector. Remove and inspect low washer fluid lamp. If lamp is open, replace low washer fluid lamp. If lamp is okay, go to next step.
  3. Ensure ignition switch is in ON position. Using scan tool in voltmeter mode, check voltage on message center connector terminal No. 4 (Dark Blue/White wire). If voltage is less than 10 volts, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
  4. Reinstall low washer fluid lamp. Reconnect message center connector. Connect jumper wire between message center connector terminal No. 6 (Red wire) and chassis ground. If low washer fluid lamp does not illuminate, replace message center. If low washer fluid lamp illuminates, go to next step.
  5. Turn ignition off. Disconnect Body Control Module (BCM) Bone connector. BCM is located behind right kick panel. Connect jumper wire between BCM Bone connector terminal No. 6 (Red wire) and chassis ground. Turn ignition on. If low washer fluid lamp does not illuminate, repair open Red wire. If low washer fluid lamp illuminates, replace BCM.
  6. Using scan tool, stop low washer fluid lamp actuation. Disconnect washer fluid level connector from bottom of washer fluid reservoir. Connect jumper wire between washer fluid level connector terminals No. 1 (Black wire) and No. 2 (Black/Tan wire). Go to next step.
  7. Using scan tool, read washer fluid switch status. If scan tool displays WASH FLUID LOW, replace washer fluid level switch. If scan tool does not display WASH FLUID LOW, disconnect jumper wire. Go to next step.
  8. Connect jumper wire between washer fluid level connector terminal No. 2 (Black/Tan wire) and chassis ground. If scan tool displays WASH FLUID LOW, repair open Black/Tan wire. If scan tool does not display WASH FLUID LOW, go to next step.
  9. Gain access to Body Control Module (BCM). BCM is located behind right kick panel. Leave BCM connectors connected. Connect jumper wire between BCM Gray connector terminal No. 17 (Black/Tan wire) and chassis ground. If scan tool displays WASH FLUID LOW, repair open Black/Tan wire. If scan tool does not display WASH FLUID LOW, replace BCM.
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