GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1

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

Go to Step 2

Go to Exterior Lighting Systems Description and Operation

2

Verify that the hazard lamps are inoperative.

Do the hazard lamps operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Inspect the HAZ LP fuse in the underhood fuse block.

Is the fuse open?

Go to Step 8

Go to Step 4

4

Using a test lamp from ground, backprobe the battery positive voltage circuit to the multifunction switch at connector C211. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

  1. Activate the hazard switch.
  2. Using a test lamp from ground, backprobe the turn/hazard module 2 supply voltage circuit at connector C211. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

6

Test for an open, high resistance or short to ground in the turn/hazard module 2 supply voltage circuit or short to ground in the battery positive voltage circuit. Refer to Circuit Testing in Wiring Systems.

Was a problem found?

Go to Step 8

Go to Step 10

7

Repair the open or high resistance in the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 11

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8

Repair the open, high resistance or short to ground in the turn/hazard module 2 supply voltage circuit or a short to ground in the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 11

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9

Replace the multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.

Did you complete the repair?

Go to Step 11

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10

Replace the turn signal lamp flasher. Refer to Hazard and Turn Signal Flasher Replacement .

Did you complete the repair?

Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3