GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Place the hazard switch to the ON position.

Do the hazard lamps turn ON?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the hazard switch.
  2. Install a fused jumper between the hazard switch signal circuit and the ground circuit.

Do the hazard lamps illuminate?

Go to Step 8

Go to Step 4

4

Using a test lamp connected to battery positive voltage, probe the ground circuit of the hazard switch.

Does the test lamp illuminate?

Go to Step 5

Go to Step 6

5

Test the hazard warning switch signal circuit for an open, poor connection or a short to battery positive. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

6

Repair a poor connection, open or a short to battery positive voltage in the hazard warning switch ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 9

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7

Replace the body control module (BCM). Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 9

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8

Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement .

Is the repair complete?

Go to Step 6

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9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3