GM Service Manual Online
For 1990-2009 cars only

Turn Signal Lamp Inoperative - Left Side Front Domestic

Step

Action

Value(s)

Yes

No

DEFINITION: The left front turn signal is inoperative, but the right front turn signal, the front park lamps, and rear turn signals are operating correctly.

1

Review the turn signal operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Attempt to operate the left turn signal.

Does the system operate normally?

--

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

Go to Step 3

3

  1. Visually and physically inspect the left front turn signal bulb.
  2. Replace the lamp bulb if it is defective.

Did you replace the lamp bulb?

--

Go to Step 5

Go to Step 4

4

Repair the open CKT 14 (LT BLU) between splice S236 and the left front park and turn signal lamp.

Did you complete the repair?

--

Go to Step 5

--

5

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3

Turn Signal Lamp Inoperative - Left Side Front Export

Step

Action

Value(s)

Yes

No

DEFINITION: The left front turn signal is inoperative, but the right front turn signal, and rear turn signals are operating correctly.

1

Review the turn signal operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Attempt to operate the left turn signal.

Does the system operate normally?

--

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

Go to Step 3

3

  1. Visually and physically inspect the left front turn signal bulb.
  2. Replace the lamp bulb if it is defective.

Did you replace the lamp bulb?

--

Go to Step 7

Go to Step 4

4

  1. Remove the inoperative bulb.
  2. Test continuity between ground and the ground cavity of the lamp connector.

Did the test incidate continuity?

--

Go to Step 6

Go to Step 5

5

Repair the open CKT 150 (BLK) between the lamp connector and ground.

Did you complete the repair?

--

Go to Step 7

--

6

Repair the open CKT 14 (LT BLU) between splice S236 and the left front turn signal lamp connector.

Did you complete the repair?

--

Go to Step 7

--

7

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3