GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Corvette 🢒 Body and Accessories 🢒 Entertainment 🢒 One or Two Rear Speakers are Inoperative

One or Two Rear Speaker(s) are Inoperative

Step

Action

Value(s)

Yes

No

DEFINITION: Either one or both of the rear speakers are not operating correctly.

1

Where you sent here from the Audio Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

Are both of the rear speakers inoperative?

Go to Step 8

Go to Step 3

3
  1. Turn the ignition switch to OFF.
  2. Disconnect the inoperative speaker connector.
  3. Using a DMM, measure the resistance across the speaker from terminal A to terminal B.

Is the resistance between the specified values?

3-6ohms

Go to Step 4

Go to Step 12

4
  1. Disconnect the radio connector C2.
  2. Using a DMM, measure the resistance at the inoperative speaker connector from terminal B to ground.

Is the measured resistance to ground infinite?

Go to Step 5

Go to Step 6

5

Using a DMM, measure the resistance at the speaker connector from terminal A to ground.

Is the measured resistance to ground infinite?

Go to Step 8

Go to Step 7

6

Repair a short to ground in the speaker feed CKT 199 or CKT 46 (see schematic) depending on which side was tested.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System

7

Repair a short to ground in the speaker return for CKT 116 or CKT 115 (see schematic) depending on which side was tested.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System

8

Check for continuity in the speaker feed circuit:

    • (Left side) Using a DMM, check for continuity between the radio connector C2 terminal 20 and the LH rear speaker connector terminal B.
    • (Right side) Using a DMM, check for continuity between the radio connector C2 terminal 18 and the RH rear speaker connector terminal B.

Is continuity present between these terminals?

Go to Step 9

Go to Step 10

9

Check for continuity in the speaker return circuit:

    • (Left side) Using a DMM, check for continuity between the radio connector C2 terminal 19 and the LH front speaker connector terminal A.
    • (Right side) Using a DMM, check for continuity between the radio connector C2 terminal 17 and the RH front speaker connector terminal A.

Is continuity present between these terminals?

Go to Step 13

Go to Step 11

10
    • (Right side) Repair the open in CKT 46.
    • (Left side) Repair the open in CKT 199.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System

11
    • (Right side) Repair the open in CKT 115.
    • (Left side) Repair the open in CKT 116.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System

12

Replace the inoperative speaker.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System

13

Replace the radio.

Is the repair complete?

Go to Diagnostic System Check - Radio/Audio System