No Sound From All Speakers

*NO SOUND FROM ALL SPEAKERS

For a complete Audio System Circuit Diagram, Schematics and Diagrams.

Diagnostic Test
MEASURE POWER AMPLIFIER FUSED IGNITION SWITCH OUTPUT CIRCUIT VOLTAGE
NOTE: Inspect Fuse 23 located in the Underhood Accessory Fuse Block. If the fuse is open, repair the cause of the open fuse before continuing.

Turn the ignition off.
Disconnect the Power Amplifier harness connector.

NOTE: Check connector - Clean/repair as necessary.

Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the Power Amplifier harness connector cavity 1 (connector B).
Is the voltage above 10 volts?

Yes

- Go to

No

- Repair the Power Amplifier Fused Ignition Switch Output circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test

MEASURE POWER AMPLIFIER FUSED IGNITION SWITCH OUTPUT CIRCUIT VOLTAGE

With the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the Power Amplifier harness connector cavity 9 (connector B).
Is the voltage above 10 volts?

Yes

- Go to

No

- Repair the Power Amplifier Fused Ignition Switch Output circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test

MEASURE POWER AMPLIFIER GROUND CIRCUIT RESISTANCE

Turn the ignition off.
Measure the resistance between ground and the Ground circuit at cavity 11 (connector A) of the Power Amplifier harness connector.
Is the resistance below 5.0 ohms?

Yes

- Go to

No

- Repair the Ground circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test

MEASURE POWER AMPLIFIER GROUND CIRCUIT RESISTANCE

With the ignition off.
Measure the resistance between ground and the Ground circuit at cavity 4 (connector A) of the Power Amplifier harness connector.
Is the resistance below 5.0 ohms?

Yes

- Replace the Power Amplifier. Amplifier - Removal.
- Perform BODY VERIFICATION TEST. Body Verification Test

No

- Repair the Ground circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test