GM Service Manual Online
For 1990-2009 cars only

License Lamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

  1. Remove the bulb from the license lamp connector.
  2. Connect a J 39200 DMM between the license lamp connector, cavity B for CKT 250 (BLK), and ground.

Is continuity present?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 250 (BLK) between the license lamp connector and ground G401.

Is the license lamp operative?

--

Go to Exterior Lights System Check

Go to Step 4

4

  1. Connect an unpowered test lamp between the license lamp connector, cavity A for CKT 9 (BRN), and ground.
  2. Place the headlamp switch in the park lamps position.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Replace the license lamp bulb.

Is the license lamp operative?

--

Go to Exterior Lights System Check

Go to Step 6

6

Repair the open in CKT 9 (BRN) between splice S402 and the license lamp connector.

Is the rear taillamp or the lamps operative?

--

Go to Exterior Lights System Check

--

License Lamps Inoperative Export

Step

Action

Value(s)

Yes

No

1

Was the Exteroir Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

  1. Remove the bulb from either rear license lamp connector.
  2. Connect a J 39200 DMM between the rear license lamp connector cavity B CKT 250 (BLK) and ground.

Is continuity present?

--

Go to Step 3

Go to Step 4

3

  1. Connect an unpowered test lamp between either rear license lamp connector cavity A and ground.
  2. Place the headlamp switch in the park lamps position.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 250 (BLK) between either rear license lamp connector and ground G401.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Replace the rear license lamp bulb(s).

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Repair the open in CKT 909 (BRN) between S324 and the rear license lamp connector(s).

Is the repair complete?

--

Go to Exterior Lights System Check

--