For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Radio/Audio System Schematics
1 | Did you review the Radio/Audio System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Radio/Audio System Description and Operation
2 |

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the radio.
3. Adjust the radio balance and fade controls to each speaker.

Do all of the speakers operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3 |

1. Remove the radio.
2. Turn the ignition ON.

Adjust volume level.

3. Test the appropriate speaker output circuits of the radio for A/C voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did the A/C voltage fluctuate with the audio output?

Go to Step 4

Go to Step 8

4 |

1. Turn OFF the ignition.
2. Disconnect the radio.
3. Test the appropriate speaker output circuits of the radio for high resistance or an open . Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5 | Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections . Did you find and correct the condition? | Go to Step 9 | Go to Step 6
6 | Inspect for poor connections at the harness connector of the appropriate speaker. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs inWiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7
7 | Replace the speaker. Refer to Speaker Replacement Reference . Did you complete the replacement? | Go to Step 9 | --
8 | Replace the radio. Radio Replacement Did you complete the replacement? | Go to Step 9 | __
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2