GM Service Manual Online
For 1990-2009 cars only

Low and High Beams Headlamps Inoperative Non VE1

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlights System Check?

--

Go to Step 2

Go to Headlight System Check

2

Use a test lampJ 35616-200 in order to backprobe CKT 42 (RED) cavity C at the headlamp and panel dimmer switch to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Turn the headlamp and panel dimmer switch to the ON position.
  2. Backprobe the headlamp and panel dimmer switch connector with a test lampJ 35616-200 from CKT 10 (YEL) cavity G to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 42 (RED) between the underhood fuse-relay center and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Headlight System Check

--

5

  1. Disconnect the headlamp dimmer switch.
  2. Connect a test lampJ 35616-200 from the headlamp dimmer switch connector CKT 10 (YEL) cavity D to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

6

Replace the headlamp and panel dimmer switch Headlamp Switch Replacement .

Is the replacement complete?

--

Go to Headlight System Check

--

7

Replace the headlamp dimmer switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Headlight System Check

--

8

Repair the open in CKT 10 (YEL) between the headlamp and panel dimmer switch and the headlamp dimmer switch.

Is the repair complete?

--

Go to Headlight System Check

--

Low and High Beams Headlamps Inoperative VE1

Step

Action

Value(s)

Yes

No

1

Did the Headlight System Check Bring you here?

--

Go to Step 2

Go to Headlight System Check

2

Check LIGHTING Fuse 8 at the Underhood Fuse/Relay Center.

Is the fuse functional?

--

Go to Step 4

Go to Step 3

3

Locate overload and replace LIGHTING Fuse.

Is the repair complete?

--

Go to Headlight System Check

--

4

Connect a test lampJ 35616-200 from CKT 42 (RED) wire at Headlamp Switch cavity C to ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 5

5

Connect test lampJ 35616-200 from CKT 42 (RED) wire at Connector C100 cavity A6 to ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

6

  1. Place the Headlamp Switch in the HEAD position.
  2. Connect a test lampJ 35616-200 from CKT 10 (YEL) wire at Headlamp Switch cavity G to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 11

7

Connect a test lampJ 35616-200 from CKT 10 (YEL) wire at C201 cavity E13 to ground.

Does the test lamp light?

--

Go to Step 8

Go to Step 12

8

Connect a test lampJ 35616-200 from CKT 10 (LT BLU) wire cavity D at Headlamp Dimmer Switch to ground.

Does the test lamp light?

--

Go to Step 13

Go to Step 14

9

Locate and repair open in CKT 42 (RED) wire between Connector C100 and Headlamp and Panel Dimmer Switch.

Is the repair complete?

--

Go to Headlight System Check

--

10

Locate and repair open in CKT 42 (RED) wire between Connector C100 and Underhood Fuse-Relay Center.

Is the repair complete?

--

Go to Headlight System Check

--

11

Replace Headlamp Switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Headlight System Check

--

12

Locate and repair open in CKT 10 (YEL) wire between Headlamp Switch and C201.

Is the repair complete?

--

Go to Headlight System Check

--

13

Replace Headlamp Dimmer Switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Headlight System Check

--

14

Locate and repair open in CKT 10 (LT BLU) wire between C201 and Headlamp Dimmer Switch.

Is the repair complete?

--

Go to Headlight System Check

--