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For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Firebird 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Turn Signal Lamps and/or Indicators Inoperative

Turn Signal Lamps and/or Indicators Inoperative Chevrolet Domestic

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2
  1. Turn the ignition switch to the OFF position.
  2. Engage the park brake.
  3. Turn the ignition to the ON position, with the engine OFF.
  4. Place the turn signal switch in the LH and RH ON position.

Do the turn signals operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the turn signal lamps and indicators inoperative?

Go to Step 6

Go to Step 4

4

Are only the turn signal indicators inoperative?

Go to Step 9

Go to Step 5

5

Are the front turn signals inoperative?

Go to Step 10

Go to Step 12

6
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the turn signal flasher module.
  3. Connect a test lamp between the ignition 3 voltage circuit of the turn signal flasher module and a good ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 18

7
  1. Install a fused jumper between the ignition 3 voltage circuit and the turn signal flasher signal circuit of the turn signal flasher module connector.
  2. Place the turn signal switch in the RH ON position and the LH ON position.

Do the turn signal lamps illuminate?

Go to Step 19

Go to Step 8

8
  1. Leave the fused jumper connected.
  2. Backprobe the turn signal flasher signal circuit of the female C216 connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 20

Go to Step 24

9
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel cluster (IPC).
  3. Probe the inoperative turn signal switch signal supply voltage circuit of the instrument panel cluster (IPC) connector with a test lamp that is connected to ground.
  4. Turn the ignition to the ON position, with the engine OFF.
  5. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 21

Go to Step 25

10
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative front turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative front turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 13

Go to Step 11

11
  1. Disconnect the daytime running lamps (DRL) control module connector.
  2. Connect a test lamp between the turn signal switch signal circuit of the (DRL) control module connector and a good ground.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 16

Go to Step 15

12
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative rear turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative rear turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 14

Go to Step 17

13
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative front turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 30

Go to Step 26

14
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative rear turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 30

Go to Step 27

15

Test for an open or high resistance in the inoperative front turn signal circuit of the turn signal switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 20

16

Test for an open or high resistance in the supply voltage circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 22

17

Test for an open or high resistance in the supply voltage circuit of the inoperative rear turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 20

18

Test for an open or high resistance ignition 3 voltage circuit of the turn signal flasher module. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 23

19

Inspect for poor connections at the harness connector of the turn signal flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 28

20

Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 31

21

Inspect for poor connections at the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 29

22

Inspect for poor connections at the daytime running lamps (DRL) control module Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 32

23

Repair the short to ground in the ignition 3 voltage circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

24

Repair the open or high resistance in the signal circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

25

Repair the open or high resistance in the switch signal circuit of the inoperative turn signal indicator. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

26

Repair the open or high resistance in the ground circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

27

Repair the open or high resistance in the ground circuit of the inoperative rear turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

28

Replace the turn signal flasher module.

Did you complete the replacement?

Go to Step 33

--

29

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 33

--

30

Replace the inoperative turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement and Tail Lamp Bulb Replacement .

Did you complete the replacement?

Go to Step 33

--

31

Replace the turn signal switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 33

--

32

Replace the daytime running lamp (DRL) control relay. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Did you complete the replacement?

Go to Step 33

--

33

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Turn Signal Lamps and/or Indicators Inoperative Japan

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Place the turn signal switch in the LH and RH ON position.

Do the turn signals operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the turn signal lamps and indicators inoperative?

Go to Step 7

Go to Step 4

4

Are all the following lamps inoperative on one side?

    • The rear turn signal
    • The marker lamp
    • The turn signals indicator

Go to Step 10

Go to Step 5

5

Are only the turn signal indicators inoperative?

Go to Step 11

Go to Step 6

6

Are the front turn signals inoperative or operating at a reduced intensity?

Go to Step 12

Go to Step 14

7
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the turn signal flasher module.
  3. Connect a test lamp between the ignition 3 voltage circuit of the turn signal flasher module connector and a good ground.

Does the test lamp illuminate?

Go to Step 8

Go to Step 16

8
  1. Install a fused jumper between the ignition 3 voltage circuit and the turn signal flasher signal circuit of the turn signal flasher module connector.
  2. Place the turn signal switch in the RH ON position and the LH ON position.

Do the turn signal lamps illuminate?

Go to Step 18

Go to Step 9

9
  1. Leave the fused jumper connected.
  2. Backprobe the turn signal flasher signal circuit of the female C216 connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 19

Go to Step 23

10
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Backprobe the affected turn signal supply voltage circuit of the male C216 connector with a test lamp that is connected to ground.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 24

Go to Step 19

11
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel cluster (IPC).
  3. Probe the inoperative turn signal switch signal supply voltage circuit of the instrument panel cluster (IPC) connector with a test lamp that is connected to ground.
  4. Turn the ignition to the ON position, with the engine OFF.
  5. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 20

Go to Step 25

12
  1. Connect a test lamp between the park lamp supply voltage circuit of the inoperative front turn signal lamp and a good ground.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 13

Go to Step 17

13
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative front turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 21

Go to Step 26

14
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 15

Go to Step 27

15
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 21

Go to Step 28

16

Test for an open or high in the resistance ignition 3 voltage circuit of the turn signal flasher module. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 22

17

Test for an open or high resistance in the park lamp supply voltage circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 19

18

Inspect for poor connections at the harness connector of the turn signal flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 29

19

Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 30

20

Inspect for poor connections at the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 31

21

Inspect for poor connections at the inoperative turn signal bulb. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

Go to Step 32

22

Repair the short to ground in the ignition 3 voltage circuit of the turn signal flasher module or the turn signal supply voltage circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

23

Repair the open or high resistance in the signal circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

24

Repair the open or high resistance in the affected turn signal supply voltage circuit of the turn signal switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

25

Repair the open or high resistance in the affected turn signal supply voltage circuit of the turn signal indicator. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

26

Repair the open or high resistance in the ground circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

27

Repair the open or high resistance in the supply voltage circuit of the inoperative turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

28

Repair the open or high resistance in the ground circuit of the inoperative turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 33

--

29

Replace the turn signal flasher module.

Did you complete the replacement?

Go to Step 33

--

30

Replace the turn signal switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 33

--

31

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 33

--

32

Replace the inoperative turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement and to Tail Lamp Bulb Replacement .

Did you complete the replacement?

Go to Step 33

--

33

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Turn Signal Lamps and/or Indicators Inoperative Europe, Scandinavia

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Place the turn signal switch in the LH and RH ON position.

Do the turn signals operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the turn signal lamps and indicators inoperative?

Go to Step 8

Go to Step 4

4

Are all of the following lamps inoperative on one side?

    • The front turn signal
    • The marker lamp
    • The turn signals indicator

Go to Step 12

Go to Step 5

5

Are only the turn signal indicators inoperative?

Go to Step 13

Go to Step 6

6

Are all of the following lamps inoperative on one side?

    • The front turn signal
    • The marker lamp

Go to Step 28

Go to Step 7

7

Are the rear turn signals inoperative?

Go to Step 14

Go to Step 16

8
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the turn signal flasher module.
  3. Connect a test lamp between the ignition 3 voltage circuit of the turn signal flasher module connector and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 18

9
  1. Install a fused jumper between the ignition 3 voltage circuit and the turn signal flasher signal circuit of the turn signal flasher module connector.
  2. Place the turn signal switch in the RH ON position and the LH ON position.

Do the turn signal lamps illuminate?

Go to Step 10

Go to Step 11

10

Connect a test lamp between the ground circuit of the turn signal flasher module connector and battery voltage.

Does the test lamp illuminate?

Go to Step 20

Go to Step 31

11
  1. Leave the fused jumper connected.
  2. Backprobe the turn signal flasher signal circuit of the female C216 connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 21

Go to Step 25

12
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Backprobe the affected turn signal supply voltage circuit of the male C216 connector with a test lamp that is connected to ground.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 26

Go to Step 21

13
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel cluster (IPC).
  3. Probe the inoperative turn signal switch signal supply voltage circuit of the instrument panel cluster (IPC) connector with a test lamp that is connected to ground.
  4. Turn the ignition to the ON position, with the engine OFF.
  5. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 22

Go to Step 27

14
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative rear turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative rear turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 15

Go to Step 19

15
  1. Connect a test lamp between the ground circuit and the supply voltage circuit of the inoperative rear turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 23

Go to Step 29

16
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 17

Go to Step 30

17
  1. Connect a test lamp between the ground circuit and the supply voltage circuit of the inoperative turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 23

Go to Step 32

18

Test for an open or high in the resistance in the ignition 3 voltage circuit of the turn signal flasher module. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 24

19

Test for an open or high resistance turn signal supply voltage circuit of the inoperative rear turn signal. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 21

20

Inspect for poor connections at the harness connector of the turn signal flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 33

21

Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 34

22

Inspect for poor connections at the Instrument Panel Cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 35

23

Inspect for poor connections at the inoperative turn signal bulb. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 36

24

Repair the short to ground in the ignition 3 voltage circuit of the turn signal flasher module of the turn signal supply voltage circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

25

Repair the open or high resistance in the signal circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

26

Repair a poor connection or open at the harness connector of the C216. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

27

Repair the open or high resistance in the affected turn signal supply voltage circuit of the turn signal indicator. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

28

Repair the open or high resistance in the affected turn signal supply voltage circuit of the front turn signal and marker lamp between C216 and the lamps. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

29

Repair the open or high resistance in the ground circuit of the inoperative rear turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

30

Repair the open or high resistance in the supply voltage circuit of the inoperative turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

31

Repair the open or high resistance in the ground circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

32

Repair the open or high resistance in the ground circuit of the inoperative turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

--

33

Replace the turn signal flasher module.

Did you complete the replacement?

Go to Step 37

--

34

Replace the turn signal switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 37

--

35

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 37

--

36

Replace the inoperative turn signal lamp. Refer to appropriate procedure:

Did you complete the replacement?

Go to Step 37

--

37

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Turn Signal Lamps and/or Indicators Inoperative Pontiac

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2
  1. Turn the ignition switch to the OFF position.
  2. Engage the park brake.
  3. Turn the ignition to the ON position, with the engine OFF.
  4. Place the turn signal switch in the LH and RH ON position.

Do the turn signals operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the turn signal lamps and indicators inoperative?

Go to Step 8

Go to Step 4

4

Are only the turn signal indicators inoperative?

Go to Step 11

Go to Step 5

5

Are all of the following turn signals inoperative on one side?

    • The front turn signal
    • The turn signal indicator

Go to Step 12

Go to Step 6

6

Are all of the following turn signals inoperative on one side?

    • The inboard rear turn signal
    • The outboard rear turn signal

Go to Step 13

Go to Step 7

7

Are the front turn signals inoperative?

Go to Step 14

Go to Step 17

8
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the turn signal flasher module.
  3. Connect a test lamp between the ignition 3 voltage circuit of the turn signal flasher module and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 19

9
  1. Install a fused jumper between the ignition 3 voltage circuit and the turn signal flasher signal circuit of the turn signal flasher module connector.
  2. Place the turn signal switch in the RH ON position and the LH ON position.

Do the turn signal lamps illuminate?

Go to Step 21

Go to Step 10

10
  1. Leave the fused jumper connected.
  2. Backprobe the turn signal flasher signal circuit of the female C216 connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 22

Go to Step 27

11
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel cluster (IPC).
  3. Probe the inoperative turn signal switch signal supply voltage circuit of the instrument panel cluster (IPC) connector with a test lamp that is connected to ground.
  4. Turn the ignition to the ON position, with the engine OFF.
  5. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 23

Go to Step 28

12
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Backprobe the affected turn signal switch signal circuit of the male C216 connector with a test lamp that is connected to ground.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp illuminate?

Go to Step 29

Go to Step 22

13
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Using a test lamp that is connected to ground, backprobe the supply voltage circuit of the affected rear turn signals at the male C216 connector.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp illuminate?

Go to Step 30

Go to Step 22

14
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative front turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative front turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 16

Go to Step 15

15
  1. Disconnect the daytime running lamps (DRL) control module connector.
  2. Connect a test lamp between the turn signal switch signal circuit of the (DRL) control module connector and a good ground.
  3. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 20

Go to Step 31

16
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative front turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 25

Go to Step 32

17
  1. Turn the ignition to the ON position, with the engine OFF.
  2. Disconnect the inoperative rear turn signal lamp.
  3. Connect a test lamp between the supply voltage circuit of the inoperative rear turn signal lamp and a good ground.
  4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 18

Go to Step 33

18
  1. Connect a test lamp between the ground circuit and the turn signal lamp supply voltage circuit of the inoperative rear turn signal lamp.
  2. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?

Go to Step 25

Go to Step 34

19

Test for an open or high resistance ignition 3 voltage circuit of the turn signal flasher module. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 26

20

Test for an open or high resistance in the supply voltage circuit of the inoperative front turn signal. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 24

21

Inspect for poor connections at the harness connector of the turn signal flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 35

22

Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 36

23

Inspect for poor connections at the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 37

24

Inspect for poor connections at the daytime running lamps (DRL) control module Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 38

25

Inspect for poor connections at the inoperative turn signal lamp. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

Go to Step 39

26

Repair the short to ground in the ignition 3 voltage circuit of the turn signal flasher module or the turn signal supply voltage circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

27

Repair the open or high resistance in the signal circuit of the turn signal flasher module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

28

Repair the open or high resistance in the turn signal switch signal circuit of the turn signal indicator. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

29

Repair the poor connection at the turn signal switch signal circuit of the connector C216. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

30

Repair the open or high resistance in the supply voltage circuit of the affected rear turn signals. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

31

Repair the open or high resistance in the turn signal switch signal circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

32

Repair the open or high resistance in the ground circuit of the inoperative front turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

33

Repair the open or high resistance in the supply voltage circuit of the inoperative rear turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

34

Repair the open or high resistance in the ground circuit of the inoperative rear turn signal. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 40

--

35

Replace the turn signal flasher module.

Did you complete the replacement?

Go to Step 40

--

36

Replace the turn signal switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 40

--

37

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 40

--

38

Replace the daytime running lamp (DRL) control relay. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Did you complete the replacement?

Go to Step 40

--

39

Replace the inoperative turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement and to Tail Lamp Bulb Replacement .

Did you complete the replacement?

Go to Step 40

--

40

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2