Speakers Inoperative - One or More

SPEAKERS INOPERATIVE - ONE OR MORE

PRELIMINARY INFORMATION
Perform the Diagnostic System Check -Radio, Stereo and Compact Disc.

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the Replacement of a component, always inspect for a poor connection before proceeding with Replacement.

ALL SPEAKERS INOPERATIVE

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the list leads to the Replacement of a component, always inspect for a poor connection before proceeding with the Replacement.

With RPO UM8
1. Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open.
2. Ground circuit to the amplifier open. Test the ground circuit to the amplifier for an open.
3. Speaker output from the radio shorted. Test each speaker output of the radio for a short to ground or short to voltage.
4. No audio output from the amplifier. Replace the amplifier.

ONE SPEAKER INOPERATIVE

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the Replacement of a component, always inspect for a poor connection before proceeding with Replacement.

Without RPO UM8
1. Speaker output circuit from amplifier open. Test the appropriate speaker output circuits for an open.

IMPORTANT: The radio must be programmed after Replacement. Refer to Service Programming System (SPS) in Vehicle Control Systems. Programming and Relearning

2. No audio output from the radio. 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 on. If no AC voltage is present, Replace the radio.
3. 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. If no AC voltage is present, Replace the amplifier.

SPEAKERS - ONE CHANNEL INOPERATIVE

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the Replacement of a component, always inspect for a poor connection before proceeding with Replacement.

1. Speaker output circuit from amplifier shorted. Test the appropriate speaker output circuits for a short to ground or short to voltage.
2. Replace the amplifier.