For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire Radio/Audio System Check performed? | -- | Go to Step 2 | Go to Radio/Audio System Check
2 |

1. Turn the ignition switch to the ACCY position.
2. Turn the radio on.
3. Insert a cassette or compact disc from J 39916-A
4. Set the radio balance and fade controls to the detent (center) position.
5. Set the radio volume at the normal listening level.
6. Play the combination test tone from the cassette or CD.
7. Backprobe with a DMM between terminal A and terminal B of the inoperative speaker.

Does the meter reading vary above 3V AC?

> 3V AC

Go to Step 3

Go to Step 4

3 |

1. Inspect for a poor connection at the speaker.
2. Replace the speaker if the connection is OK. Refer to Speaker Replacement .

Is the repair complete?

--

Go to Step 7

--

4 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the amplifier connector.
3. Probe the amplifier connector between the feed (+) and return (-) circuits of the inoperative speaker with a DMM.

Is the resistance approximately 2-4ohms?

2-4ohms

Go to Step 5

Go to Step 6

5 |

1. Inspect the speaker feed and the return circuits for a short to B+ or ground.
2. Inspect for a poor connection at the amplifier.
3. Replace the amplifier if the connections are OK. Refer to Radio Speaker Amplifier Replacement .

Is the repair complete?

--

Go to Step 7

--

6 |

1. Inspect for a poor connection at the speaker.
2. Repair open in the speaker feed or the return circuit between the speaker and the amplifier.

Is the repair complete?

--

Go to Step 7

--

7 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all the repairs been made?

--

Go to Radio/Audio System Check

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