GM Service Manual Online
For 1990-2009 cars only

Park Lamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

DEFINITION: The park lamps are inoperative at both the right front and left front of the vehicle, but the taillamps and side markers operate correctly with the park lamps or headlamps on.

1

Review the park lamp 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 park lamps.

Does the system operate normally?

--

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

Go to Step 3

3

  1. Remove the park lamp bulbs.
  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 B of one of the park lamp connectors.

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 park and turn signal lamp.

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

Park Lamps Inoperative Export

Step

Action

Value(s)

Yes

No

DEFINITION: The position lamps are inoperative at both the right front and left front of the vehicle, but the rear park lamps and front turn signals operate correctly.

1

Review the park 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 parklamps.

Do the front position lamps operate normally?

--

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

Go to Step 3

3

  1. Remove the position lamp bulbs.
  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 connectors.

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 park and turn signal lamp.

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