GM Service Manual Online
For 1990-2009 cars only

Side Marker Lamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

DEFINITION: The side marker lamps are inoperative on both sides of the vehicle, but the front and rear park lamps are operating correctly.

1

Review the side marker 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 side marker lamps operate normally?

--

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

Go to Step 3

3

  1. Remove the bulbs from the front side marker lamps.
  2. Visually and physically inspect the bulbs.

Are the bulbs okay?

--

Go to Step 5

Go to Step 4

4

Replace the defective bulbs.

Did you complete the repair?

--

Go to Step 8

--

5

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

Did the measurement equal battery voltage?

B+

Go to Step 7

Go to Step 6

6

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

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open ground circuit (BLK) or (BLK/WHT).

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 Lamps Inoperative Export

Step

Action

Value(s)

Yes

No

DEFINITION: The position lamps are inoperative on both sides of the vehicle, but the front turn signals and rear park lamps 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 normally?

--

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

Go to Step 3

3

  1. Remove the bulbs from the front position lamps.
  2. Visually and physically inspect the bulbs.

Are the bulbs okay?

--

Go to Step 5

Go to Step 4

4

Replace the defective bulbs.

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.

Did the measurement equal battery voltage?

B+

Go to Step 7

Go to Step 6

6

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

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open ground circuit (BLK) or (BLK/WHT).

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