GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The left high beam headlamp does not operate, but there is no problem with the low beam headlamps or the right high beam headlamp.

1

Review the high beam headlamp operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Attempt to operate the high beam headlamps.

Does the left high beam headlamp operate normally?

--

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

Go to Step 3

3

  1. Disconnect the left high beam headlamp connector.
  2. Turn on the high beam headlamps.
  3. Test the voltage of the input circuit (LT GRN) at the left high beam headlamp connector.

Is battery voltage available at the left high beam headlamp connector?

--

Go to Step 5

Go to Step 4

4

Repair the open in CKT 11 (LT GRN).

Did you complete the repair?

--

Go to Step 6

--

5

Replace the left high beam headlamp.

Did you complete the repair?

--

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3