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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Wiring Systems And Power Management - Service, Troubleshooting & Diagnosis) >> Retained Accessory Power (RAP) Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the RAP Relay.
  2. With the driver door open, verify that a test lamp does not illuminate between the rap relay control circuit terminal N1 and B+.
    • If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
  3. Verify that a test lamp does not illuminate between the rap relay accessory circuit terminal M1 and ground.
      IMPORTANT: The accessory circuit supplies voltage to multiple components from the RAP relay. A short to voltage on any of the circuits will supply voltage to all components.
    • If the test lamp illuminates, test the accessory circuit for a short to voltage.
  4. If all circuits test normal, test or replace the RAP relay.
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