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?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Do the high beam headlamps operate properly?

--

Go to Step 3

Go to Headlamps Inoperative - High Beams

3

  1. Turn OFF the ignition.
  2. Disconnect the lighting control module (LCM).
  3. Turn ON the ignition, with the engine OFF.

Did the high beam indicator turn OFF?

--

Go to Step 5

Go to Step 4

4

Test the high beam indicator control circuit for a short to battery positive voltage (B+). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 7

5

Inspect for poor connections at the LCM connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 6

6

Replace the LCM. Refer to Lamp Control Module Replacement .

Did you complete the replacement?

--

Go to Step 9

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7

Inspect for poor connections at the IP cluster connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 8

8

Replace the IP cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the repair?

--

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 2