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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Corvette 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lamps (DRL) Headlamps Inoperative

Daytime Running Lamps (DRL) Headlamps Inoperative Canada

Daytime Running Lamps Inoperative (Canada)

Step

Action

Value(s)

Yes

No

1

Were you sent hear from the DRL System Check?

--

Go to Step 2

Go to DRL System Check

2
  1. Disconnect the DRL Control Module connectors C1 and C2.
  2. Turn the ignition switch to the ON position.
  3. Connect a DMM between the DRL Control Module connector C2 terminal C and ground.
  4. Measure the voltage at the DRL Control Module connector C2 terminal C.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 7

Go to Step 3

3

Check the CR CONT MiniFuse® #20 for an open.

Is the CR CONT MiniFuse® #20 open?

--

Go to Step 4

Go to Step 5

4

Repair a short to the ground in CKT 1239.

Is the repair complete?

--

Go to DRL System Check

--

5
  1. Remove the CR CONT MiniFuse® #20.
  2. Connect a DMM between the instrument panel electrical center terminal A which is used for the CR CONT MiniFuse® #20 and ground.
  3. Measure the voltage at terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 6

Refer to Power Distribution

6

Repair a poor connection or an open in CKT 1239.

Is the repair complete?

--

Go to DRL System Check

--

7
  1. Connect a DMM between the DRL Control Module connector C2 terminal F and ground.
  2. Measure the voltage at the DRL Control Module connector C2 terminal F.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 12

Go to Step 8

8

Check the BCM 13 MiniFuse® #6 for an open.

Is the fuse open?

--

Go to Step 9

Go to Step 10

9

Repair a short to ground in CKT 141.

Is the repair complete?

--

Go to DRL System Check

--

10
  1. Remove the BCM 13 MiniFuse® #6.
  2. Connect a DMM between the instrument panel electrical center terminal A which is used for the BCM 13 MiniFuse® #6 and ground.
  3. Measure the voltage at terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 11

Refer to Power Distribution

11

Repair a poor connection or an open in CKT 141.

Is the repair complete?

--

Go to DRL System Check

--

12
  1. Connect a DMM between the DRL Control Module connector C2 terminal A and ground.
  2. Measure the continuity between the DRL Control Module connector C2 terminal A and ground.

Is CKT 150 continuous to ground?

--

Go to Step 14

Go to Step 13

13

Repair an open in CKT 150 between the DRL Control Module connector C2 terminal A and G201.

Is the repair complete?

--

Go to DRL System Check

--

14
  1. Connect a DMM between the DRL Control Module connector C2 terminals E and F.
  2. Measure the voltage at the DRL Control Module connector C2 terminals E and F.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 15

Go to Step 18

15
  1. Keep the DMM connected between the DRL Control Module connector C2 terminals E and F.
  2. Disconnect the park brake switch connector.
  3. Measure the voltage at the DRL Control Module connector C2 terminals E and F.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 16

Go to Step 17

16

Repair a short to ground in CKT 33.

Is the repair complete?

--

Go to DRL System Check

--

17

Replace the Park Brake Switch.

Is the repair complete?

--

Go to DRL System Check

--

18
  1. Connect a DMM between the DRL Control Module connector C1 terminals D and ground.
  2. Measure the voltage at the DRL Control Module connector C1 terminal D.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 25

Go to Step 19

19
  1. Remove the HDLP Circuit Breaker #53.
  2. Connect a DMM between the instrument panel electrical center terminal A which is used for the HDLP Circuit Breaker #53 and ground.
  3. Measure the voltage at terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 20

Refer to Power Distribution

20

Connect a fused jumper (20 A) between the instrument panel electrical center terminal A and terminal B which is used for the HDLP Circuit Breaker #53.

Does the 20 A fuse within the fused jumper immediately show an open circuit?

--

Go to Step 21

Go to Step 22

21

Repair a short to ground in CKT 842 or CKT 103.

Is the repair complete?

--

Go to DRL System Check

--

22
  1. Leave the fused jumper (20 A) in place between the instrument panel electrical center terminal A and terminal B which is used for the HDLP Circuit Breaker #53.
  2. Connect a DMM between the DRL Control Module connector C1 terminal D and ground.
  3. Measure the voltage at the DRL Control Module connector C1 terminal D.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 23

Go to Step 24

23

Replace the HDLP Circuit Breaker #53.

Is the repair complete?

--

Go to DRL System Check

--

24

Repair the open in CKT 842.

Is the repair complete?

--

Go to DRL System Check

--

25
  1. Reconnect both DRL Control Module connectors C1 and C2.
  2. Turn the ignition switch to the ON position.
  3. Backprobe the DRL Control Module connector C1 terminal F with the positive lead from a DMM.
  4. Connect the negative lead of the DMM to ground.
  5. Measure the voltage at the DRL Control Module connector C1 terminal F.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 27

Go to Step 26

26

Replace the DRL Control Module.

Is the repair complete?

--

Go to DRL System Check

--

27
  1. Disconnect the headlamp opening door actuator control module connector C1.
  2. Turn the ignition switch to the ON position.
  3. Connect a DMM between the headlamp opening door actuator control module connector C1 terminal A and ground.
  4. Measure the voltage at the headlamp opening door actuator control module connector C1 terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 28

Go to Step 29

28

Replace the headlamp opening door actuator control module.

Is the repair complete?

--

Go to DRL System Check

--

29

Repair the open in CKT 103.

Is the repair complete?

--

Go to DRL System Check

--

Daytime Running Lamps (DRL) Headlamps Inoperative Domestic/Export

Daytime Running Lights Inoperative (Domestic/Export)

Step

Action

Value(s)

Yes

No

1

Were you sent hear from the DRL System Check?

--

Go to Step 2

Go to DRL System Check

2

Perform the BCM Diagnostic System Check.

Are any DTCs stored in memory?

--

Go to the applicable DTC table

Go to Step 3

3

Are both the LH and RH turn/park lamps inoperative during Daytime Running Lamps (DRL) operational mode?

--

Go to Step 32

Go to Step 4

4

Is just the RH turn/park lamp inoperative during DRL operational mode?

--

Go to Step 6

Go to Step 5

5

Is just the LH turn/park lamp inoperative during DRL operational mode?

--

Go to Step 19

Go to DRL System Check

6
  1. Remove the DRL R Micro Relay #38 from the instrument panel electrical center.
  2. Connect a DMM between ground and the BAT terminal inside the instrument panel electrical center which is used for the DRL R Micro Relay #38.
  3. Measure the voltage at the BAT terminal in the instrument panel electrical center which is used for the DRL R Micro Relay #38.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 8

Go to Step 7

7

Replace the instrument panel electrical center.

Is the repair complete?

--

Go to DRL System Check

--

8

Connect a fused jumper (10 A) between the CKT 1315 terminal and the BAT terminal of the instrument panel electrical center which is used for the DRL R Micro Relay #38.

Does the RH turn/park illuminate?

--

Go to Step 10

Go to Step 9

9
  1. Leave the fused jumper (10 A) in place.
  2. Remove the RH turn/park lamp from its socket.
  3. Connect a DMM between the RH turn/park lamp socket terminal A and ground.
  4. Measure the voltage at terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 15

Go to Step 18

10
  1. Reinstall the DRL R Micro Relay #38 back into the instrument panel electrical center.
  2. Disconnect the BCM connector C2.
  3. Connect a fused jumper (10 A) between the BCM connector C2 terminal D16 and ground.

Does the RH turn/park lamp illuminate?

--

Go to Step 11

Go to Step 12

11

Replace the BCM.

Is the repair complete?

--

Go to DRL System Check

--

12
  1. Remove the DRL R Micro Relay #38 from the instrument panel electrical center.
  2. Connect a DMM between the CKT 1966 terminal in the instrument panel electrical center which is used for the DRL R Micro Relay #38 and the BCM connector C2 terminal D16.
  3. Measure CKT 1966 for continuity between the CKT 1966 terminal in the instrument panel electrical center which is used for the DRL R Micro Relay #38 and the BCM connector C2 terminal D16.

Is CKT 1966 continuous between these two terminals?

--

Go to Step 13

Go to Step 14

13

Replace the DRL R Micro Relay #38.

Is the repair complete?

--

Go to DRL System Check

--

14

Repair the open in CKT 1966.

Is the repair complete?

--

Go to DRL System Check

--

15
  1. Connect the DMM between the RH turn/park lamp socket terminal G and ground.
  2. Measure for continuity between the RH turn/park lamp socket terminal G and ground.

Is the CKT 150 continuous to ground?

--

Go to Step 17

Go to Step 16

16

Repair an open in CKT 150 between the RH turn/park lamp socket terminal G and G102.

Is the repair complete?

--

Go to DRL System Check

--

17

Replace the RH turn/park lamp.

Is the repair complete?

--

Go to DRL System Check

--

18

Repair an open in CKT 1315 between the instrument panel electrical center and the RH turn/park lamp.

Is the repair complete?

--

Go to DRL System Check

--

19
  1. Remove the DRL L Micro Relay #40 from the instrument panel electrical center.
  2. Connect a DMM between ground and the BAT terminal in the instrument panel electrical center which is used for the DRL L Micro Relay #40.
  3. Measure the voltage at the BAT terminal in the instrument panel electrical center which is used for the DRL L Micro Relay #40.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 21

Go to Step 20

20

Replace the instrument panel electrical center.

Is the repair complete?

--

Go to DRL System Check

--

21

Connect a fused jumper (10 A) between the CKT 1314 terminal and the BAT terminal in the instrument panel electrical center which is used for the DRL L Micro Relay #40.

Does the LH turn/park illuminate?

--

Go to Step 23

Go to Step 22

22
  1. Leave the fused jumper (10 A) in place.
  2. Remove the LH turn/park lamp from its socket.
  3. Connect a DMM between the LH turn/park lamp socket terminal A and ground.
  4. Measure the voltage at terminal A.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 28

Go to Step 31

23
  1. Reinstall the DRL L Micro Relay #40 back into the instrument panel electrical center.
  2. Disconnect the BCM connector C3.
  3. Connect a fused jumper (10 A) between the BCM connector C3 terminal A7 and ground.

Does the LH turn/park lamp illuminate?

--

Go to Step 24

Go to Step 25

24

Replace the BCM.

Is the repair complete?

--

Go to DRL System Check

--

25
  1. Remove the DRL L Micro Relay #40 from the instrument panel electrical center.
  2. Connect a DMM between the CKT 1976 terminal in the instrument panel electrical center which is used for the DRL L Micro Relay #40 and the BCM connector C3 terminal A7.
  3. Measure CKT 1976 for continuity between the CKT 1976 terminal in the instrument panel electrical center which is used for the DRL L Micro Relay #40 and the BCM connector C3 terminal A7.

Is CKT 1976 continuous between these two terminals?

--

Go to Step 26

Go to Step 27

26

Replace the DRL 7 Micro Relay #40.

Is the repair complete?

--

Go to DRL System Check

--

27

Repair the open in CKT 1976.

Is the repair complete?

--

Go to DRL System Check

--

28
  1. Connect the DMM between the LH turn/park lamp socket terminal G and ground.
  2. Measure for continuity between the LH turn/park lamp socket terminal G and ground.

Is the CKT 150 continuous to ground?

--

Go to Step 30

Go to Step 29

29

Repair an open in CKT 150 between the LH turn/park lamp socket terminal G and G102.

Is the repair complete?

--

Go to DRL System Check

--

30

Replace the LH turn/park lamp.

Is the repair complete?

--

Go to DRL System Check

--

31

Repair an open in CKT 1314 between the instrument panel electrical center and the LH turn/park lamp.

Is the repair complete?

--

Go to DRL System Check

--

32
  1. Remove the APPROACH Minifuse® #2.
  2. Connect a DMM between the instrument panel electrical center terminal A9 which is used for the APPROACH Minifuse® #2 and ground.
  3. Measure the voltage at terminal A9.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 33

Refer to Power Distribution

33

Connect a fused jumper (20 A) between the instrument panel electrical center terminal A9 and terminal B9 which is used for the APPROACH Minifuse® #2.

Does the 20 A fuse within the fused jumper immediately show an open circuit?

--

Go to Step 34

Go to Step 35

34

Repair a short to ground in CKT 2740.

Is the repair complete?

--

Go to DRL System Check

--

35
  1. Leave the fused jumper (20 A) in place between the instrument panel electrical center terminal A9 and terminal B9 which is used for the APPROACH Minifuse® #2.
  2. Disconnect the instrument panel electrical center connector C1.
  3. Connect a DMM between the instrument panel electrical center connector C1 terminal A9 and ground.
  4. Measure the voltage at the instrument panel electrical center connector C1 terminal A9.

Is the voltage within the specified values?

10.0-14.0V

Go to Step 36

Go to Step 37

36

Replace the instrument panel electrical center.

Is the repair complete?

--

Go to DRL System Check

--

37

Repair the open in CKT 2740.

Is the repair complete?

--

Go to DRL System Check

--