GM Service Manual Online
For 1990-2009 cars only

High Beam On with Headlamp Switch Off 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

Disconnect the headlamp dimmer switch at the steering column C201 connector.

Do the high beam headlamps remain lit?

--

Go to Step 3

Go to Step 4

3

Repair the short to voltage on CKT 11 (LT GRN) between the headlamp dimmer switch and the headlamps.

Is the repair complete?

--

Go to Headlight System Check

--

4

  1. Reconnect the headlamp dimmer switch C201 connector.
  2. Disconnect the headlamp and panel dimmer switch.

Do the high beam headlamps remain lit?

--

Go to Step 5

Go to Step 6

5

Repair the short to voltage in CKT 10 (YEL) between the headlamp dimmer switch and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Headlight System Check

--

6

Replace the headlamp and panel dimmer switch Headlamp Switch Replacement .

Is the replacement complete?

--

Go to Headlight System Check

--

High Beam On with Headlamp Switch Off 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

Disconnect Headlamp Dimmer Switch.

Do the High Beam Headlamps turn off?

--

Go to Step 3

Go to Step 4

3

  1. Connect Headlamp Dimmer Switch.
  2. Disconnect Headlamp and Panel Dimmer Switch Connector.

Do the High Beam Headlamps turn off?

--

Go to Step 5

Go to Step 6

4

Locate and repair short to voltage in CKT 11 (LT GRN) wire between Headlamp Dimmer Switch and Headlamps.

Is the repair complete?

--

Go to Headlight System Check

--

5

Replace Headlamp and Panel Dimmer Switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Headlight System Check

--

6

Locate and repair short to voltage in CKT 10 (YEL) wire between Headlamp and Panel Dimmer Switch and C201 or CKT 10 (LT BLU) wire between C20 and Headlamp Dimmer Switch.

Is the repair complete?

--

Go to Headlight System Check

--