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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 574 (Entertainment System) >> Diagnostic Information and Procedures >> Speakers Inoperative - One Or More (W/Y91) >> Front Bass Speaker and Rear Subwoofer Speaker Inoperative

Front Bass Speaker and Rear Subwoofer Speaker Inoperative

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Low level audio circuit from the Bose amplifier leading to and from the affected sub-amplifier is open or shorted. Test the appropriate low level audio circuits of the Bose amplifier for an open or short. Refer to CIRCUIT TESTING and to WIRING REPAIRS .
  2. Ground circuit of the amplifier is open. Test ground circuit of the amplifier for an open. Refer to CIRCUIT TESTING and to WIRING REPAIRS .
  3. Audio output from the sub-amplifier is not evident. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. Refer to Speaker Replacement Reference . If AC voltage is not present, replace the sub-amplifier. Refer to Amplifier Replacement - Rear Quarter (Luxury Y91) .
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