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Home >> Hummer >> 2009 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Audio System Troubleshooting Hints >> Identifying Concerns
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Identifying Concerns

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. In order to isolate the source of the noise/poor reception, identify the ignition switch position that the concern is most noticeable:
    1. Turn the ignition switch to the accessory position.
    2. Turn ON the radio.
    3. Seek up 88-108 FM then 550-1600 AM.
    4. Record the number of valid radio stations where the tuner stops.
    5. Repeat these steps with the ignition ON, and the engine OFF then again with the engine running.
  2. Return the ignition switch to the position that the concern was most noticeable.
  3. Remove fuses or circuit breakers one at a time until the noise has been eliminated.
  4. Identify what systems or components are powered by the fuse.
  5. Reinstall all fuses and circuit breakers.
  6. Disconnect the components powered by the fuse one at a time until the concern has been eliminated.
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