GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Silhouette 🢒 Body and Accessories 🢒 Entertainment 🢒 Speakers Inoperative - One or More

Step

Action

Value(s)

Yes

No

1

Inspect the vehicle for radio rear seat audio control.

Is the vehicle equipped with radio rear seat audio control?

--

Go to Step 11

Go to Step 2

2
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the inoperative speaker.
  3. Use a DMM in order to measure the resistance of the speaker.

Is the resistance within the specified range?

4-15ohms

Go to Step 3

Go to Step 9

3
  1. Disconnect all of the radio connectors.
  2. Use the DMM in order to measure the resistance at the inoperative speaker connector from terminal A to ground.

Does the resistance match the specified value?

Infinite

Go to Step 4

Go to Step 5

4

Use the DMM in order to measure the resistance at the speaker connector from terminal B to ground.

Is the resistance infinite?

--

Go to Step 6

Go to Step 10

5

Repair a short to ground in the speaker return circuit.

Has the repair been made?

--

Go to Radio/Audio System Check

--

6
  1. Reconnect the speaker.
  2. Use the DMM in order to measure the resistance at the radio connector of the speaker FEED and RETURN circuit of the affected speaker.

Does the resistance measure between the specified values?

4-15ohms

Go to Step 7

Go to Step 8

7

Service the radio. Refer to Radio Replacement .

Has the repair been made?

--

Go to Radio/Audio System Check

--

8
  1. Inspect for faulty connections at the following locations:
    2. • The speaker
    • The in-line connectors
  2. If the connections are OK, repair the faulty connection or the open in the speaker FEED or RETURN circuit.

Has the repair been made?

--

Go to Radio/Audio System Check

--

9
  1. Test for a short to B+ in the speaker FEED or RETURN circuit.
  2. If the circuit is OK, replace the speaker.

Has the repair been made?

--

Go to Radio/Audio System Check

--

10

Repair the short to ground in the speaker FEED circuit.

Has the repair been made?

--

Go to Radio/Audio System Check

--

11

Inspect the liftgate speakers.

Are the liftgate speakers inoperative?

--

Go to Step 12

Go to Step 2

12
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the inoperative speaker.
  3. Use the DMM in order to measure the resistance of the speaker.

Is the resistance within the specified range?

4-15ohms

Go to Step 13

Go to Step 9

13
  1. Disconnect the radio rear seat audio control connector.
  2. Use the DMM in order to measure the resistance at the inoperative speaker harness connector from terminal A to ground.

Is the resistance infinite?

--

Go to Step 14

Go to Step 5

14

Use the DMM in order to measure the resistance at the speaker connector from terminal B to ground.

Is the resistance infinite?

--

Go to Step 15

Go to Step 10

15
  1. Reconnect the speaker.
  2. Disconnect the radio.
  3. Use the DMM in order to measure the resistance at the radio rear seat audio control harness connector from the speaker RETURN IN circuit to ground.

Is the resistance infinite?

--

Go to Step 16

Go to Step 5

16

Use the DMM in order to measure the resistance at the radio rear seat audio control connector from the speaker FEED IN circuit to ground.

Is the resistance infinite?

--

Go to Step 18

Go to Step 10

17

Service the radio rear seat audio controller. Refer to Rear Seat Audio Control Replacement .

Has the repair been made?

--

Go to Radio/Audio System Check

--

18
  1. Reconnect the rear seat audio control connector to the rear seat audio controller.
  2. Use the DMM in order to measure the resistance at the radio connector FEED and RETURN circuit of the affected speaker.

Is the resistance within the specified range?

4-15ohms

Go to Step 7

Go to Step 19

19
  1. Disconnect the rear seat audio control connector.
  2. Use a J 35616-A jumper kit in order to jump the affected rear speaker FEED and RETURN circuits to the radio at the rear seat audio control connector.
  3. Use a DMM in order to measure the resistance at the radio connector FEED and RETURN circuits of the affected speaker.

Is the resistance within the specified range?

0-1ohms

Go to Step 20

Go to Step 8

20

Use a DMM in order to measure the resistance at the rear seat audio control connector FEED and RETURN circuits of the affected speaker.

Is the resistance within the specified range?

4-15ohms

Go to Step 21

Go to Step 8

21
  1. Test CKT 906 (radio rear seat audio control enable) for a short to voltage.
  2. If CKT 906 has no short to voltage, replace the rear seat audio controller.

Has the repair been made?

--

System OK

--