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

Disconnect the turn signal multifunction lever connector.

Did the hazard lamps turn OFF?

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Go to Step 6

Go to Step 3

3

Test hazard switch input circuit for a short to ground. 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

Go to Step 4

4

Inspect for poor connections at the turn signal hazard flasher module. 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 8

Go to Step 5

5

Replace the turn signal/hazard flasher module. Refer to Hazard Lamp Flasher Replacement .

Did you complete the replacement?

--

Go to Step 8

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6

Inspect for poor connections at the turn signal multifunction lever. 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 8

Go to Step 7

7

Replace the hazard switch assembly. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

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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