GM Service Manual Online
For 1990-2009 cars only

License Lamps Inoperative One Lamp

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

  1. Disconnect connector C407.
  2. Connect a test lamp between the license lamp connector, cavity B for CKT 150 (BLK), and B+.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Connect a test lamp between the license lamp connector, cavity A for CKT 9 (BRN), and ground.
  2. Place the headlamp and panel dimmer 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 150 (BLK) between the license lamp connector and ground G401.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Replace the license lamp bulb.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Repair the open in CKT 9 (BRN) between splice S415 and the license lamp connector.

Is the repair complete?

--

Go to Exterior Lights System Check

--

License Lamps Inoperative Both Lamps

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Connect a J 35616-200 between the headlamp and panel dimmer switch, cavity H for CKT 240 (BRN), and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Place the headlamp and panel dimmer switch in the park lamps position.
  2. Connect a J 35616-200 between the headlamp and panel dimmer switch connector, cavity S, and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 240 (BRN) between the instrument panel fuse block and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Repair the open in CKT 9 (BRN) between the headlamp and panel dimmer switch and splice S210.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Replace the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--