GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the radio/audio system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Verify that one of the speakers is inoperative.

Does the speaker operate normally?

--

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

Go to Step 3

3

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the speaker connector.
  3. Measure the resistance of the speaker.

Is the resistance within the specified range?

4-15 ohms

Go to Step 4

Go to Step 7

4

Measure the resistance at the speaker connector from terminal A to ground. Refer to Circuit Testing in Wiring Systems.

Does the resistance equal the specified value?

Infinite

Go to Step 5

Go to Step 8

5

Measure resistance at the speaker connector from terminal B to ground. Refer to Circuit Testing in Wiring Systems.

Does the resistance equal the specified value?

Infinite

Go to Step 6

Go to Step 9

6

  1. Reconnect the speaker connector.
  2. Measure the resistance at the radio connector for the speaker feed circuits.

Is the resistance within the specified range?

4-15ohms

Go to Step 10

Go to Step 11

7

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

Is the replacement complete?

--

Go to Step 14

--

8

Repair a short to ground in the speaker return circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 14

--

9

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

Is the repair complete?

--

Go to Step 14

--

10

  1. Inspect for poor connections at the radio.
  2. Inspect for poor connections at the speaker.

Are any poor connections present?

--

Go to Step 12

Go to Step 13

11

  1. Inspect for poor connections at the speaker.
  2. Inspect for poor connections at the in-line connectors.
  3. Inspect for an open in the speaker feed circuits.

Are any poor connections present?

--

Go to Step 12

Go to Step 13

12

Repair the poor connections. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 14

--

13

Service the radio. Refer to Radio Replacement .

Is service of the radio complete?

--

Go to Step 14

--

14

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3