GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Remove the bulb from the LH front door courtesy lamp.
  3. Connect a test lamp between the feed circuit of the LH front door courtesy lamp bulb and a good ground.

Does the test lamp light?

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Go to Step 3

Go to Step 6

3

Connect a test lamp between the feed circuit of the LH front door courtesy lamp bulb and the ground circuit of the LH front door courtesy lamp bulb.

Does the test lamp light?

--

Go to Step 4

Go to Step 7

4

Inspect for poor connections at the bulb of the LH front door courtesy lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 8

Go to Step 5

5

Replace the LH front door courtesy lamp bulb.

Did you complete the replacement?

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Go to Step 8

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6

Repair open in the feed circuit of the LH front door courtesy lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 8

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7

Repair the high resistance or an open in the ground circuit of the LH front door courtesy. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 2