GM Service Manual Online
For 1990-2009 cars only

Turn Signal Lamp Inoperative - Left Side Front Sealed

Step

Action

Value(s)

Yes

No

1

  1. Remove the bulb from the left front park and turn signal lamp connector.
  2. Connect a J 39200 DMM between the left front park and turn signal lamp connector, cavity G for CKT 150 (BLK), and ground.

Is continuity present?

--

Go to Step 3

Go to Step 2

2

Repair the open in CKT 150 (BLK) between the left front park and turn signal lamp connector and ground G108.

Is the left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

Go to Step 3

3

  1. Place the ignition switch in the RUN position.
  2. Place the turn signal switch in the left turn position.
  3. Connect an unpowered test lamp between the left front park and turn signal lamp connector, cavity A for CKT 14 (LT BLU), and ground.
  4. Place the headlamp switch in the park lamps position.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

4

Replace the left front park and turn signal lamp bulb.

Is the left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

Go to Step 5

5

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

Is the left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

--

Turn Signal Lamp Inoperative - Left Side Front Composite

Step

Action

Value(s)

Yes

No

1

  1. Remove the bulb from the inner or the outer left front park and turn signal lamp connector.
  2. Connect a J 39200 DMM between the inner or the outer left front park and turn signal lamp connector, cavity G for CKT 150 (BLK), and ground.

Is continuity present?

--

Go to Step 3

Go to Step 2

2

Repair the open in CKT 150 (BLK) between the inner or the outer left front park and turn signal lamp connector and ground G108.

Is the inner or the outer left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

Go to Step 3

3

  1. Place the ignition switch in the RUN position.
  2. Place the turn signal switch in the left turn position.
  3. Connect an unpowered test lamp between the inner or the outer left front park and turn signal lamp connector, cavity A for CKT 14 (LT BLU), and ground.
  4. Place the headlamp switch in the park lamps position.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

4

Replace the inner or the outer left front park and turn signal lamp bulb.

Is the inner or the outer left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

Go to Step 5

5

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

Is the inner or the outer left front park and turn signal lamp operative?

--

Go to Exterior Lights System Check

--