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Exterior Lights Test 7A - FOGLIGHTS Inoperative

NOTE: Perform EXTERIOR LIGHTS TEST 1A  before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAM. Perform TEST VER-1A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
  1. Using scan tool, read foglight switch status. Turn foglight switch on and off. If scan tool displays ON and OFF, go to step 5). If scan tool does not display ON and OFF, go to next step.
  2. Ensure ignition and courtesy lights are off. Disconnect headlight switch connector. Using scan tool in ohmmeter mode, probe headlight switch connector terminal No. 5 (Black wire). If resistance is more than 10 ohms, repair open in Black wire. If resistance is 10 ohms or less, go to next step.
  3. Using scan tool, read foglight switch status. Connect jumper wire between headlight switch connector terminal No. 6 (Brown/White wire) and chassis ground. If scan tool displays ON to OFF when jumper wire is grounded, replace headlight switch. If scan tool does not display ON to OFF when jumper wire is grounded, go to next step.
  4. Connect jumper wire between headlight switch connector terminal No. 6 (Brown/White wire) and chassis ground. Disconnect Body Control Module (BCM) Black 24-pin connector. With scan tool in ohmmeter mode, probe BCM Black 24-pin connector terminal No. 15 (Brown/White wire). If resistance is more than 5 ohms, repair open in Brown/White wire. If resistance is 5 ohms or less, replace BCM.
  5. Remove foglight relay. Foglight relay is located in junction block, behind right kick panel. See Figure under EXTERIOR LIGHTS TEST 2A. Using an ohmmeter, check resistance between foglight relay connector terminals No. 85 (Dark Green/Yellow wire) and No. 86 (Red wire). If resistance is less than 65 or 90 ohms or more, replace foglight relay. If resistance is less than 90 ohms, go to next step.
  6. Using scan tool in voltmeter mode, probe foglight relay connector terminal No. 30 (Red wire). If voltage is less than 10 volts, repair open in Dark Green/Yellow wire between foglight relay terminal No. 85 and BCM Black 24-pin connector terminal No. 22. If voltage is 10 volts or more, go to next step.
  7. Using scan tool in voltmeter mode, probe foglight relay connector terminal No. 86 (Red wire). If voltage is less than 10 volts, repair open in Red wire. If voltage is 10 volts or more, go to next step.
  8. Ensure ignition is off. Using scan tool in ohmmeter mode, probe foglight relay connector terminal No. 85 (Dark Green/Yellow wire). Using scan tool, actuate foglight relay. If resistance is less than 10 ohms when foglight relay is actuated, replace foglight relay. If resistance is 10 ohms or more when foglight relay is actuated, go to next step.
  9. Connect jumper wire between foglight connector terminals No. 30 (Red wire) and No. 87 (Light Blue wire). If foglights are off, repair open in Light Blue wire. If foglights are on, go to next step.
  10. Disconnect BCM White 24-pin connector. Connect jumper wire between BCM White 24-pin connector terminal No. 22 (Dark Green/Yellow wire) and chassis ground. With scan tool in ohmmeter mode, probe foglight relay connector terminal No. 85 (Dark Green/Yellow wire). If resistance is more than 5 ohms, repair open in Dark Green/Yellow wire. If resistance is 5 ohms or less, replace BCM.
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