GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Savana 🢒 Body and Accessories 🢒 Lighting Systems 🢒 License Lamps Inoperative

License Lamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

DEFINITION: The license lamp does not operate correctly, but the right and left taillamps operate correctly when the headlamps or park lamps are on.

1

Review the license 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 license 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 license lamp.
  2. Visually and physically examine the bulb.

Is the bulb okay?

--

Go to Step 5

Go to Step 4

4

Replace the license lamp bulb.

Did you complete the repair?

--

Go to Step 8

--

5
  1. Turn on the parklamps.
  2. Measure the voltage at cavity A of license 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 S402 and the license lamp connector.

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open CKT 250 (BLK) between the license 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

License Lamps Inoperative Export

Step

Action

Value(s)

Yes

No

DEFINITION: The license lamps do not operate correctly, but the right and left taillamps operate correctly when the headlamps or park lamps are on.

1

Review the license 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 license lamps operate correctly?

--

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

Go to Step 3

3
  1. Remove the bulbs from the license lamp.
  2. Visually and physically examine the bulbs.

Are the bulbs okay?

--

Go to Step 5

Go to Step 4

4

Replace the license lamp bulb(s).

Did you complete the repair?

--

Go to Step 8

--

5
  1. Turn on the parklamps.
  2. Measure the voltage cavity A of the license 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 S324 and the license lamp connector.

Did you complete the repair?

--

Go to Step 8

--

7

Repair the open CKT 250 (BLK) between the license 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