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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1632 (Entertainment System) >> Diagnostic Information and Procedures >> Speakers Inoperative-One or More >> One Speaker Inoperative >> With RPO UQ7

With RPO UQ7

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Speaker output circuit from amplifier open. Test the appropriate speaker output circuits for an open. Refer to CIRCUIT TESTING  and WIRING REPAIRS .
    IMPORTANT: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to Audio Amplifier Setup  .
  2. No audio output from the amplifier. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to 50 percent. If AC voltage is present, replace the speaker. Refer to Speaker Replacement Reference   .  If no AC voltage is present, replace the amplifier. Refer to Amplifier Replacement   . 
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