GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2

Verify that the hazard lamps are always on.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Remove the hazard switch

Did the hazard lamps turn off?

Go to Step 4

Go to Step 5

4

Replace the hazard switch. Refer to Hazard Warning Switch Replacement .

Is the replacement complete?

Go to Step 8

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5

With the hazard switch and flasher relay removed. Check for continuity to ground between cavity 4 of the hazard switch and cavity 8 of the flasher relay. Refer to Circuit Testing .

Is a ground present?

Go to Step 6

Go to Step 7

6

Repair short to ground between cavity 4 of the hazard switch and cavity 8 of the flasher relay. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 8

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7

Replace the flasher relay. Refer to Hazard and Turn Signal Flasher Replacement

Did you complete the replacement?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3