Speakers Inoperative - One or More

SPEAKERS INOPERATIVE - ONE OR MORE

SCHEMATIC REFERENCE: RADIO/AUDIO SYSTEM SCHEMATICS

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. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagnostic Aids.

With RPO UW6
1. Speaker output shorted - Test all speaker outputs for a short.
2. Defective Radio - Replace Radio.

With RPO U99
1. Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open.
2. Low level audio signal circuit shorted. Test all Low level audio signal circuits for a short to ground or short to voltage.
3. No low level audio output from the radio. Test for any AC voltage between the left front low level audio signal circuits at the amplifier harness connector, disconnected with the radio volume adjusted to 50 percent. If no AC voltage is present, replace the radio.
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. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagnostic Aids.

With RPO UW6
1. Speaker output open. Test the appropriate speaker output circuits for an open.
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 an audible level. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the radio.

With RPO U99
1. Speaker output circuit from amplifier open or shorted. Test the appropriate speaker output circuits for an open or short.
2. Low level audio circuit open. Test the appropriate low level audio circuit for an open.
3. No low level audio output from the radio. Test for any AC voltage between the appropriate low level audio signal circuits at the amplifier harness connector, disconnected with the radio volume adjusted to an audible level. If no AC voltage is present, replace the radio.
4. 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 an audible level. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the amplifier.

SPEAKER(S) - REDUCED VOLUME

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. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagnostic Aids.

With RPO UW6
1. Speaker output circuit high resistance. Test the appropriate speaker output circuits for high resistance.
2. Defective speaker - Replace the appropriate speaker.

With RPO U99
1. Speaker output circuit high resistance. Test the appropriate speaker output circuits for high resistance.
2. Low level audio circuit open. Test the appropriate low level audio circuit for an open.
3. Defective speaker - Replace the appropriate speaker.