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DTC B2476: Parking Lights Output Fault: Testing

  1. If BCM system check was performed, go to next step. If BCM system check was not performed, go to BCM SYSTEM CHECK  .
  2. Connect scan tool. Select PARK LAMPS from light test menu in SPECIAL FUNCTIONS. While observing scan tool, press on and off buttons on scan tool several times. If status changes and parking lights operate with commanded state, go to next step. If status does not change or parking lights do not operate with commanded state, go to step 4).
  3. Check for poor connection at BCM 32-pin, connector C2, terminal C12 (Brown/White wire). Check all BCM power and ground circuits. See WIRING DIAGRAMS  . Ensure all connectors and components are connected. Using scan tool, clear codes. Check for codes. If DTC B2476 is set, go to step 9). If DTC B2472 is not set, go to BCM SYSTEM CHECK  .
  4. Remove parking light relay. See Figure . Disconnect BCM 32-pin C2 connector. Using DVOM, check resistance between BCM connector C2, terminal C12 (Brown/White wire) and parking light relay terminal No. 1 (Brown/White wire) at relay box. If resistance is less than 2 ohms, go to step 5). If resistance is not less than 2 ohms, go to step 6).
  5. Move DVOM lead from parking light relay terminal No. 1 (Brown/White wire) to ground. If resistance is infinite, go to step 7). If resistance is not infinite, go to step 8).
  6. Repair open in Brown/White wire between parking light relay and BCM. Perform BCM SYSTEM CHECK  .
  7. Replace parking light relay. Reinstall all connectors and components. Using scan tool, clear codes. Check for codes. If DTC B2476 is set, go to step 9). If DTC B2476 is not set, go to BCM SYSTEM CHECK  .
  8. Repair short to ground in Brown/White wire between parking light relay and BCM. Perform BCM SYSTEM CHECK  .
  9. Replace BCM. See BODY CONTROL MODULE (BCM)  under REMOVAL & INSTALLATION. Reprogram BCM. See PROGRAMMING  . Perform BCM SYSTEM CHECK.
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