GM Service Manual Online
For 1990-2009 cars only

Side Marker Lamp Inoperative - One Lamp Domestic

Step

Action

Value(s)

Yes

No

DEFINITION: The front side marker does not operate on one side of the vehicle, but the front and rear parklamps and turn signals are operating correctly.

1

Review the side marker operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Turn on the park lamps.

Do the side marker lamps operate correctly?

--

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

Go to Step 3

3

  1. Remove the bulb from the side marker lamp socket.
  2. Visually and physically examine the bulb.

Is the bulb okay?

--

Go to Step 5

Go to Step 4

4

Replace the front side marker lamp bulb.

Is the repair complete?

--

Go to Step 8

--

5

  1. Turn on the park lamps.
  2. Measure the voltage at cavity A of the side marker lamp connector.

Is the measurement equal to battery voltage?

B+

Go to Step 7

Go to Step 6

6

Repair the open CKT 9 (BRN) between splice S135 and the marker lamp.

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open circuit (BLK) or (BLK/WHT) between the side marker lamp connector and ground.

Did you complete the repair?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3

Side Marker Lamp Inoperative - One Lamp Export

Step

Action

Value(s)

Yes

No

DEFINITION: The front position lamp does not operate on one side of the vehicle, but the front and rear parklamps and turn signals are operating correctly.

1

Review the position lamp operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Turn on the park lamps.

Do the position lamps operate correctly?

--

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

Go to Step 3

3

  1. Remove the bulb from the position lamp socket.
  2. Visually and physically examine the bulb.

Is the bulb okay?

--

Go to Step 5

Go to Step 4

4

Replace the position lamp bulb.

Did you complete the repair?

--

Go to Step 8

--

5

  1. Turn on the park lamps.
  2. Measure the voltage at cavity A of the position lamp connector.

Is the measurement equal to battery voltage?

B+

Go to Step 7

Go to Step 6

6

Repair the open CKT 9 (BRN) between splice S225 and the position lamp.

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open circuit (BLK) or (BLK/WHT) between the position lamp connector and ground.

Did you complete the repair?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3