GM Service Manual Online
For 1990-2009 cars only

Headlamp Doors Do Not Close or Open

Step

Action

Value(s)

Yes

No

1

Was the entire headlight doors system check performed?

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Go to Step 2

Go to Headlight Doors System Check

2

  1. Disconnect the headlight opening door actator control module connectors C1 and C2.
  2. Turn the headlamps on.
  3. Using a test light probe between the headlamp opening door actuator control module connector C1 terminals A and D.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3

Using a test light probe between the headlamp opening door actuator control module connector C1 terminals C and D.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

4

Using a test light probe between the headlamp opening door actuator control module connector C1 terminal A and ground.

Does the test light illuminate?

--

Go to Step 7

Go to Step 8

5

Replace the headlamp opening door actuator control module. Refer to Headlamp Door Module Replacement

Is the replair complete?

--

Go to Step 9

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6

Repair the poor connection or open in circuit 9.

Is the repair complete?

--

Go to Step 9

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7

Repair the poor connection or open in circuit 150.

Is the repair complete?

--

Go to Step 9

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8

Repair the poor connection or open in circuit 10.

Is the repair complete?

--

Go to Step 9

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9

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

Have all the repairs been made?

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Go to Headlight Doors System Check

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