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. Disconnect the turn/hazard flasher module.
  2. Probe the feed circuit of the turn/hazard flasher module with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

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Go to Step 3

Go to Step 7

3

Connect a test lamp between the feed circuit of the turn/hazard flasher module and the ground circuit of the turn/hazard flasher module.

Does the test lamp illuminate?

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Go to Step 4

Go to Step 6

4

Inspect for poor connections at the turn/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?

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Go to Step 8

Go to Step 5

5

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

Did you complete the replacement?

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Go to Step 8

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6

Repair the open in the turn/hazard flasher module ground circuit. 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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7

Repair the open in the turn/hazard flasher module feed circuit. 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 correct the condition?

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System OK

Go to Step 2