GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: A short to ground will cause a open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1

Did you perform the radio/audio system diagnostic system check?

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Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

  1. Turn the ignition switch off.
  2. Disconnect the inoperative speaker.
  3. Measure the resistance across the inoperative speaker terminals.

Is the resistance within the specified range?

3-15 ohms

Go to Step 3

Go to Step 4

3

  1. Disconnect the radio connector.
  2. Measure the resistance between the speaker connector terminal A and ground.

Is the resistance infinite?

Go to Step 5

Go to Step 6

4

Replace the faulty speaker. Refer to Speaker Replacement .

Did you complete the repair?

--

Go to Diagnostic System Check - Radio/Audio System

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5

Measure the resistance between the speaker connector terminal B and ground.

Is the resistance infinite?

Go to Step 7

Go to Step 6

6

Repair a short to ground in the inoperative speaker feed. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - Radio/Audio System

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7

  1. Reconnect the inoperative speaker.
  2. Measure the resistance at the radio connection of the speaker feed circuit.

Is the resistance within the specified range?

3-15 ohms

Go to Step 8

Go to Step 9

8

Check for faulty connections at the radio or the speaker connectors.

Are the connections OK?

--

Go to Step 10

Got to Step 9

9

Repair a faulty connector or a high resistance in the inoperative speaker. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 10

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10

Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

--

Go to Diagnostic System Check - Radio/Audio System