Schematic Reference : Radio/Audio System Schematics

Did you perform the Radio/Audio System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

1. Turn ON the radio.
2. Adjust the radio balance and fade to the suspect speaker.

Does the speaker operate properly?

Go to Audio System Troubleshooting Hints

Go to Step 3

Are all of the speakers inoperative?

Go to Step 8

Go to Step 4

Is the vehicle equipped with a audio power booster?

Go to Step 5

Go to Step 6

Is the right or left side speakers inoperative?

Go to Step 10

Go to Step 7

1. Disconnect the radio. Refer to Radio Replacement for service procedure.
2. Momentarily touch a 1.5 volt battery between the appropriate speaker circuits.

Does the speaker emit an audible pop?

Go to Step 12

Go to Step 8

1. Disconnect the audio power booster speaker connector. Refer to Radio Speaker Amplifier Replacement .
2. Using two fused jumpers, connect the suspect speaker inputs from the radio to the suspect speaker outputs from the audio power booster in order to bypass the audio power booster.
3. Momentarily touch a 1.5 volt battery between the appropriate speaker circuits at the radio connector.

Does the speaker emit an audible pop?

Go to Step 11

Go to Step 9

Test the speaker output circuits of the radio for a short to ground or battery positive. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 13

Test the circuits of the appropriate speaker for an open, short or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 12

Test the appropriate (right or left) speaker outputs from the audio power booster for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 14

1. Reconnect the radio.
2. Turn ON the radio.

Can audio be heard from the suspect speaker?

Go to Step 14

Go to Step 13

Inspect for poor connections at the speaker. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 15

Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

Inspect for poor connections at the harness connector of the audio power booster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 17

Replace the speaker. Refer to Radio Front Speaker Replacement or Radio Rear Speaker Replacement .

Did you complete the replacement?

Go to Step 18

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Replace the radio and perform the set up procedure. Refer to Radio Replacement and Radio Setup .

Did you complete the replacement?

Go to Step 18

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Replace the audio power booster. Refer to Radio Speaker Amplifier Replacement .

Did you complete the replacement?

Go to Step 18

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2