GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Corvette 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Component Illumination Lamps Inoperative

Component Illumination Lamps Inoperative Door Switch

LH or RH Door Switch Illumination Inoperative, or Always On

Step

Action

Value(s)

Yes

No

DEFINITION: The parking lamps and instrument cluster illumination lamps function properly.

1

Were you sent here from the Lighting Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2
  1. Remove the door switch and disconnect the switch connector.
  2. Connect a test light between one of the following:
    3. • LH door switch connector terminals 21 and 22.
    • RH door switch connector terminals 1 and 2.
  3. Cover the ambient light sensor on the RH DIC.
  4. With the doors and hatch/trunk lid closed, allow approximately 30 seconds for the courtesy lamps to turn off.
  5. Turn the parking lamp switch on.
  6. Turn the interior lamp dimmer switch to the full bright position.

Does the test light illuminate bright?

--

Go to Step 5

Go to Step 3

3

Connect the test light from the:

    • LH door switch connector terminal 22 to ground.
    • RH door switch connector terminal 2 to ground.

Does the test light illuminate bright?

--

Go to Step 4

Go to Step 7

4
  1. Disconnect the DCM connector C4.
  2. Connect a DMM from the DCM connector C4 terminal 21 to the:
    3. • LH door switch connector terminal 21.
    • RH door switch connector terminal 1.
  3. Measure the resistance of circuit 157.

Is the resistance within the specified values?

0-2 ohms

Go to Step 12

Go to Step 9

5

Turn the interior lamp dimmer switch to the off position.

Does the test light change from bright to dim and then turn off?

--

Go to Step 10

Go to Step 6

6

Disconnect the DCM connector C4.

Does the test light remain illuminated?

--

Go to Step 11

Go to Step 12

7
  1. Disconnect the DCM connector C4.
  2. Connect a DMM from the DCM connector C4 terminal 22 to the:
    3. • LH door switch connector terminal 22.
    • RH door switch connector terminal 2.
  3. Measure the resistance of circuit 580.

Is the resistance within the specified values?

0-2 ohms

Go to Step 12

Go to Step 8

8

Repair the open or high resistance in circuit 580.

Is the repair complete?

--

Go to Step 13

--

9

Repair the open or high resistance in circuit 157.

Is the repair complete?

--

Go to Step 13

--

10

Replace the door switch. Refer to Front Door Switch Replacement .

Is the repair complete?

--

Go to Step 13

--

11

Repair the short to ground in circuit 157.

Is the repair complete?

--

Go to Step 13

--

12

Replace the DCM. Refer to Door Control Module Replacement .

Is the repair complete?

--

Go to Step 13

--

13
  1. Clear any DTCs which may have set. Refer to Diagnostic Trouble Code (DTC) Clearing .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Diagnostic System Check - Lighting Systems

Component Illumination Lamps Inoperative HVAC Control Assembly

HVAC Illumination Inoperative, or Always On

Step

Action

Value(s)

Yes

No

DEFINITION: The parking lamps and instrument cluster illumination lamps function properly.

1

Were you sent here from the Lighting Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2
  1. Remove the HVAC control head and disconnect connector C1. Refer to Control Assembly Replacement in HVAC Manual, or Control Assembly Replacement in HVAC Automatic.
  2. Connect a test light between connector C1:
    3. • terminals J and K. (C60)
    • terminals C1 and C16. (CJ2)
  3. Cover the ambient light sensor on the RH DIC.
  4. Doors and hatch/trunk lid closed, allow approximately 30 seconds for the courtesy lamps to turn off.
  5. Turn the parking lamp switch on.
  6. Turn the interior lamp dimmer switch to the full bright position.

Does the test light illuminate bright?

--

Go to Step 5

Go to Step 3

3

Connect the test light from the HVAC control head connector C1:

    • terminal J to ground. (C60)
    • terminal C16 to ground. (CJ2)

Does the test light illuminate bright?

--

Go to Step 7

Go to Step 4

4
  1. Disconnect the BCM connector C3.
  2. Connect a DMM from the BCM connector C3 terminal B2 to the HVAC connector C1:
    3. • terminal J. (C60)
    • terminal C16. (CJ2)
  3. Measure the resistance of circuit 390.

Is the resistance within the specified values?

0-2 ohms

Go to Step 11

Go to Step 8

5

Turn the interior lamp dimmer switch to the off position.

Does the test light change from bright to dim and then turn off?

--

Go to Step 9

Go to Step 6

6

Disconnect the BCM connector C3.

Does the test light remain illuminated?

--

Go to Step 10

Go to Step 11

7

Repair the open or high resistance in circuit 150.

Is the repair complete?

--

Go to Step 12

--

8

Repair the open or high resistance in circuit 390.

Is the repair complete?

--

Go to Step 12

--

9

Replace the HVAC control head. Refer to Control Assembly Replacement in HVAC Manual or Control Assembly Replacement in HVAC Automatic.

Is the repair complete?

--

Go to Step 12

--

10

Repair the short to voltage in circuit 390.

Is the repair complete?

--

Go to Step 12

--

11

Replace the BCM. Refer to Body Control Module Replacement and Body Control Module (BCM) Programming/RPO Configuration .

Is the repair complete?

--

Go to Step 12

--

12
  1. Clear any DTCs which may have set. Refer to Diagnostic Trouble Code (DTC) Clearing .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Diagnostic System Check - Lighting Systems

Component Illumination Lamps Inoperative PRNDL

PRNDL Illumination Inoperative, or Always On

Step

Action

Value(s)

Yes

No

DEFINITION: The parking lamps and instrument cluster illumination lamps function properly.

1

Were you sent here from the Lighting Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2
  1. Disconnect the automatic transmission shift lock control solenoid 4 pin connector.
  2. Connect a test light between terminals A and B.
  3. Cover the ambient light sensor on the RH DIC.
  4. With the doors and hatch/trunk lid closed, allow approximately 30 seconds for the courtesy lamps to turn off.
  5. Turn the parking lamp switch on.
  6. Turn the interior lamp dimmer switch to the full bright position.

Does the test light illuminate bright?

--

Go to Step 5

Go to Step 3

3

Connect the test light from the automatic transmission shift lock control solenoid 4 pin connector terminal A to ground.

Does the test light illuminate bright?

--

Go to Step 4

Go to Step 7

4
  1. Disconnect the BCM connector C3.
  2. Connect a DMM from the automatic transmission shift lock control solenoid 4 pin connector terminal B, to the BCM connector C3 terminal B6.
  3. Measure the resistance of circuit 8.

Is the resistance within the specified values?

0-2 ohms

Go to Step 11

Go to Step 8

5

Turn the interior lamp dimmer switch to the off position.

Does the test light change from bright to dim and turn off?

--

Go to Step 9

Go to Step 6

6

Disconnect the BCM connector C3.

Does the test light illuminate?

--

Go to Step 10

Go to Step 11

7

Repair the open or high resistance in circuit 240.

Is the repair complete?

--

Go to Step 12

--

8

Repair the open or high resistance in circuit 8.

Is the repair complete?

--

Go to Step 12

--

9

Replace the PRNDL illumination bulb. Refer to Transmission Floor Shift Control Indicator Lamp Replacement .

Is the repair complete?

--

Go to Step 12

--

10

Repair the short to ground in circuit 8.

Is the repair complete?

--

Go to Step 12

--

11

Replace the BCM. Refer to Body Control Module Replacement and Body Control Module (BCM) Programming/RPO Configuration .

Is the repair complete?

--

Go to Step 12

--

12
  1. Clear any DTCs which may have set. Refer to Diagnostic Trouble Code (DTC) Clearing .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Diagnostic System Check - Lighting Systems

Component Illumination Lamps Inoperative TCS Switch

TCS Switch Illumination Inoperative, or Always On

Step

Action

Value(s)

Yes

No

DEFINITION: The parking lamps and instrument cluster illumination lamps function properly.

1

Were you sent here from the Lighting Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect the F/TNKDR fuse #32 for an open.

Is the fuse open?

--

Go to Step 3

Go to Power Distribution Schematics

3

Repair the short to ground in circuit 2840 or the fuel tank filler door lock release circuit.

Is the repair complete?

--

Go to Step 14

--

4
  1. Disconnect the electronic traction/suspension control switch connector.
  2. Connect a test light between terminals 9 and 10.
  3. Cover the ambient light sensor on the RH DIC.
  4. Doors and hatch/trunk lid closed, allow approximately 30 seconds for the courtesy lamps to turn off.
  5. Turn the parking lamp switch on.
  6. Turn the interior lamp dimmer switch to the full bright position.

Does the test light illuminate bright?

--

Go to Step 7

Go to Step 5

5

Connect the test light from the electronic traction/suspension control switch connector terminal 10 to ground.

Does the test light illuminate bright?

--

Go to Step 6

Go to Step 9

6
  1. Disconnect the BCM connector C3.
  2. Connect a DMM from the electronic traction/suspension control switch connector terminal 9, to the BCM connector C3 terminal B1.
  3. Measure the resistance of circuit 1244.

Is the resistance within specified values?

0-2 ohms

Go to Step 13

Go to Step 10

7

Turn the interior lamp dimmer switch to the off position.

Does the test light change from bright to dim and turn off?

--

Go to Step 11

Go to Step 8

8

Disconnect the BCM connector C3.

Does the test light remain illuminated?

--

Go to Step 12

Go to Step 13

9

Repair the open or high resistance in circuit 2840.

Is the repair complete?

--

Go to Step 14

--

10

Repair the open or high resistance in circuit 1244.

Is the repair complete?

--

Go to Step 14

--

11

Replace the electronic traction/suspension control switch.

Is the repair complete?

--

Go to Step 14

--

12

Repair the short to ground in circuit 1244.

Is the repair complete?

--

Go to Step 14

--

13

Replace the BCM. Refer to Body Control Module Replacement and Body Control Module (BCM) Programming/RPO Configuration .

Is the repair complete?

--

Go to Step 14

--

14
  1. Clear any DTCs which may have set. Refer to Diagnostic Trouble Code (DTC) Clearing .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Diagnostic System Check - Lighting Systems