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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Speakers Inoperative - One or More >> Circuit/System Testing Only

Circuit/System Testing Only

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.

Digital Radio One or More Speakers Inoperative

  1. Ignition OFF, disconnect the radio X2 harness connector.
  2. Ignition ON, digital radio ON and tuned to a station, increase the radio volume.
  3. Verify AC voltage is not present on the suspect channel audio signal (+) and audio signal (-) from the DRR.
    • If AC voltage is present, replace the radio.
  4. Ignition OFF, disconnect the digital radio harness connector.
  5. Test for less than 1 volt on both suspect audio signal (+) and audio signal (-).
    • If greater than 1 volt repair short to voltage.
  6. Test for less than 1 ohm on the suspect audio signal (+) between the radio harness connector and the digital radio X2 harness connector.
    • If greater than specified value repair open or high resistance.
  7. Test for less than 1 ohm on the suspect audio signal (-) between the radio harness connector and the digital radio X2 harness connector.
    • If greater than specified value repair open or high resistance.
  8. If all circuits test normal, replace the digital radio receiver (DRR).

One or More Speakers Inoperative With Amplifier

  1. Center the balance and fade adjustment on the radio.
    • If adjustment of the fade and balance eliminates the concern, review the operation of the radio with the customer.
  2. Ignition OFF, Disconnect the suspect amplifier harness connector. If the suspect speaker inputs are contained in the same harness as the battery positive voltage circuit, the ground circuit, the radio amp mute signal, and the antenna switched 14-volt supply circuit. It will be required to re-connect the applicable circuits by using a fused jumper harness.
  3. Ignition ON, operate the radio and increase the radio volume.
  4. Verify AC voltage is present between the suspect speaker output (+) and speaker output (-) circuits.
    • If AC voltage is present, replace the amplifier.
  5. Reconnect the amplifier harness connector.
  6. Disconnect the suspect speaker harness connector.
  7. Verify AC voltage is present between the suspect speaker output (+) and speaker output (-) circuits.
    • If AC voltage is present, replace the suspect speaker.
  8. Ignition OFF, disconnect the suspect amplifier harness connector.
  9. Test for less than 1 volt on both suspect speaker output (+) and speaker output (-) circuits.
    • If greater than 1 volt repair short to voltage.
  10. Test for less than 1 ohm between the suspect speaker output (+) radio harness connector terminal and the suspect speaker output (+) speaker harness connector terminal.
    • If greater than specified value repair open or high resistance.
  11. Test for less than 1 ohm between the suspect speaker output (-) radio harness connector terminal and the suspect speaker output (-) speaker harness connector terminal.
    • If greater than specified value repair open or high resistance.
  12. If all circuits test normal, replace the amplifier.
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