GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Radio/audio System Check?

--

Go to Step 2

Go to Radio/Audio System Check

2

Attempt to use the radio, CD, and cassette player.

Are all of the speakers inoperative?

--

Go to Step 3

Go to Step 7

3

  1. Turn ignition switch to OFF.
  2. Disconnect the radio connector.
  3. Turn ignition switch to ON
  4. Using a J 39200 test for ignition positive voltage between terminal 4 of the radio connector and ground.

Is ignition positive voltage present?

--

Go to Step 5

Go to Step 4

4

Repair the open in the GRY wire between terminal 4 of the radio connector and terminal 1 of connector C2 of the multifunction alarm module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

5

Test for continuity using a J 39200 between terminal 9 of the radio connector and ground.

Does continuity exist between terminal 9 of the radio connector and ground?

--

Go to Step 40

Go to Step 6

6

Repair the open in the BRN wire between terminal 9 of the radio connector and ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

7

Are both rear speakers inoperative?

--

Go to Step 12

Go to Step 8

8

Is the LH rear speaker inoperative?

--

Go to Step 16

Go to Step 9

9

Is the RH rear speaker inoperative?

--

Go to Step 21

Go to Step 10

10

Is the LH front speaker inoperative?

--

Go to Step 26

Go to Step 11

11

Is the RH front speaker inoperative?

--

Go to Step 31

Go to Radio/Audio System Check

12

  1. Turn ignition switch to OFF
  2. Disconnect the radio connector. Refer to radio replacement for access.
  3. Check for continuity using a J 39200 between terminal 1 and terminal 7 of the radio connector.

Does continuity exist between terminal 1 and terminal 7 of the radio connector?

--

Go to Step 13

Go to Step 14

13

Test for a short to ground using a J 39200 between terminal 1 and ground.

Does a short to ground condition exist?

--

Go to Step 14

Go to Step 8

14

Inspect the inline connector C220 located behind the LH body hinge pillar trim panel.

Is the connector C220 unplugged or damaged?

--

Go to Step 15

Go to Step 8

15

Repair the inline connector C220.

Is the repair complete?

--

Go to Step 8

--

16

  1. Turn ignition switch to OFF
  2. Disconnect the radio connector. Refer to radio replacement for access.
  3. Test for continuity using a J 39200 between terminal 1 and terminal 7 of the radio connector.

Does continuity exist between terminal 1 and terminal 7 of the radio connector?

--

Go to Step 19

Go to Step 17

17

Test for continuity using a J 39200 between terminal 1 and 2 of the LH rear speaker.

Does continuity exist between terminal 1 and terminal 2 of the speaker?

--

Go to Step 18

Go to Step 36

18

Repair the open in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 9

--

19

Test for a short to ground using a J 39200 between terminal 7 and ground.

Does a short to ground condition exist?

--

Go to Step 20

Go to Step 40

20

Repair the short to ground condition in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 9

--

21

  1. Turn ignition switch to OFF
  2. Disconnect the radio connector. Refer to radio replacement for access.
  3. Test for continuity using a J 39200 between terminal 2 and terminal 8 of the radio connector.

Does continuity exist between terminal 2 and terminal 8 of the radio connector?

--

Go to Step 24

Go to Step 22

22

Test for continuity using a J 39200 between terminal 1 and 2 of the RH front speaker.

Does continuity exist between terminal 1 and terminal 2 of the speaker?

--

Go to Step 23

Go to Step 38

23

Repair the open in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 10

--

24

Test for a short to ground using a J 39200 between terminal 2 and ground.

Does a short to ground condition exist?

--

Go to Step 25

Go to Step 40

25

Repair the short to ground condition in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 10

--

26

  1. Turn ignition switch to OFF
  2. Disconnect the radio connector. Refer to radio replacement for access.
  3. Test for continuity using a J 39200 between terminal 5 and terminal 12 of the radio connector.

Does continuity exist between terminal 5 and terminal 12 of the radio connector?

--

Go to Step 29

Go to Step 27

27

Test for continuity using a J 39200 between terminal 1 and 2 of the RH front speaker.

Does continuity exist between terminal 1 and terminal 2 of the speaker?

--

Go to Step 28

Go to Step 37

28

Repair the open in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 11

--

29

Test for a short to ground using a J 39200 between terminal 5 and ground.

Does a short to ground condition exist?

--

Go to Step 30

Go to Step 40

30

Repair the short to ground condition in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 11

--

31

  1. Turn ignition switch to OFF
  2. Disconnect the radio connector. Refer to Radio Replacement for access.
  3. Test for continuity using a J 39200 between terminal 6 and terminal 13 of the radio connector.

Does continuity exist between terminal 6 and terminal 13 of the radio connector?

--

Go to Step 34

Go to Step 32

32

Test for continuity using a J 39200 between terminal 1 and 2 of the RH front speaker.

Does continuity exist between terminal 1 and terminal 2 of the speaker?

--

Go to Step 33

Go to Step 39

33

Repair the open in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

34

Test for a short to ground using a J 39200 between terminal 6 and ground.

Does a short to ground condition exist?

--

Go to Step 35

Go to Step 40

35

Repair the short to ground condition in the speaker feed wires. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

36

Replace speaker. Refer to Radio Rear Speaker Grille Replacement and to Radio Rear Speaker Replacement .

Is the repair complete?

--

Go to Step 9

--

37

Replace speaker. Refer to Speaker Replacement .

Is the repair complete?

--

Go to Step 11

--

38

Replace speaker. Refer to Radio Rear Speaker Grille Replacement and to Radio Rear Speaker Replacement .

Is the repair complete?

--

Go to Step 10

--

39

Replace speaker. Refer to Speaker Replacement .

Is the repair complete?

--

Go to Radio/Audio System Check

--

40

Replace the radio. Refer to Radio Replacement .

Is the repair complete?

--

Go to Radio/Audio System Check

--