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 Electrical Intermittents in Wiring Systems

Go to Step 3

3

Disconnect the hazard lamp switch.

Did the hazard lamps turn OFF?

Go to Step 7

Go to Step 4

4

  1. Remove the flasher relay.
  2. Test the signal circuit between the switch and the relay for continuity to ground.

Is a ground present?

Go to Step 5

Go to Step 6

5

Repair the short to ground in the signal circuit between the switch and the relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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6

Replace the flasher relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the repair?

Go to Step 8

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7

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

Did you complete the repair?

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