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

Observe the IP of the vehicle.

Is the cassette player incorporated into the radio?

--

Go to Step 3

Go to Step 4

3

Inspect the cassette player for an obstruction through the cassette door.

Is an obstruction present?

--

Go to Step 5

Go to Step 9

4

  1. Turn the ignition switch to the ACCY or the RUN position.
  2. Turn the radio power switch ON.
  3. Using the J 39200 , backprobe the radio connector C2.
  4. Measure the voltage between terminal 7 and ground.

Is the voltage reading more than the specified value?

10 V

Go to Step 6

Go to Step 9

5

    Notice: Improper removal may damage tape player.

  1. Remove the obstruction.
  2. Inspect and clean the moving components and the cassette head or use a cleaning cassette.
  3. Insert the diagnostic test tape from the J 39916-A .

Does the test tape operate?

--

Go to Radio/Audio System Check

Go to Step 9

6

  1. Using the J 39200 , backprobe the radio connector C2.
  2. Measure the voltage between terminal 15 and ground.

Is the voltage reading more than the specified value?

10 V

Go to Step 7

Go to Step 9

7

  1. Using the J 39200 , backprobe the radio connector.
  2. Measure the voltage between terminal 13 and B+.

Is the voltage reading more than the specified value?

10 V

Go to Step 8

Go to Step 9

8

  1. Using the J 39200 , backprobe the cassette player connector.
  2. Measure the voltage between terminal 15 and ground.

Is the voltage reading more than the specified value?

10 V

Go to Step 10

Go to Step 11

9

Remove the radio for repair.

Is the repair complete?

--

Go to Radio/Audio System Check

--

10

  1. Using the J 39200 , backprobe the cassette player.
  2. Measure the voltage between terminal 13 and B+.

Is the voltage reading more than the specified value?

10 V

Go to Step 12

Go to Step 14

11

Repair the open in CKT 1740 between the cassette player and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

12

  1. Using the J 39200 , backprobe the cassette player.
  2. Measure the voltage between terminal 7 and ground.

Is the voltage reading more than the specified value?

10 V

Go to Step 13

Go to Step 15

13

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the cassette player connector.
  3. Disconnect radio connector C2.
  4. Using the J 39200 , measure the resistance between terminal 12 of the radio connector C2 and terminal 12 of the cassette player connector.

Is the resistance measured less than the specified value?

1.0 ohms

Go to Radio/Audio System Check

Go to Step 16

14

Repair the open in CKT 151 between the cassette player and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

15

Repair the open in CKT 314 between the cassette player and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--

16

Repair the open or short to ground in CKT 1405 between the cassette player and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Radio/Audio System Check

--