GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Headlight System Check performed?

--

Go to Step  2

Go to Headlight System Check

2

Are the high beam headlights operating properly?

--

Go to Step  3

Go to Headlamps Inoperative - High Beams

3

  1. Turn the headlamp switch to the HEAD position.
  2. Turn the headlamp dimmer switch to the HIGH position.
  3. Using a test light, backprobe between the instrument cluster harness connector terminals A11 and B5.

Does the test light illuminate?

--

Go to Step  4

Go to Step  5

4

Service the instrument cluster. Refer to Instrument Cluster System Check .

Is the repair complete?

--

Go to Step  8

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5

Using a test light, backprobe between the instrument cluster harness connector terminal A11 and ground.

Does the test light illuminate?

--

Go to Step  6

Go to Step  7

6

Repair a poor connection or an open in circuit 650.

Is the repair complete?

--

Go to Step  8

--

7

Repair a poor connection or an open in circuit 11.

Is the repair complete?

--

Go to Step  8

--

8

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Headlight System Check

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