GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the ignition switch to the ON position.
  2. Place the turn signal switch in the OFF position.

Are any of the turn signals illuminated?

Go to Step 4

Go to Step 3

3

Place the turn signal switch in the RH On position and LH On position.

Do the turn signals operate properly?

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

Go to Step 7

4

Are the turn signal lamps flashing?

Go to Step 8

Go to Step 5

5

Disconnect the turn signal switch.

Are the turn signals illuminated?

Go to Step 6

Go to Step 8

6

Repair a short to voltage in the affected turn signal supply voltage circuit . Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 9

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7

If the corresponding turn signal illuminates but does not flash when the turn signal switch is ON, replace the hazard lamp/turn signal flasher. Refer to Hazard and Turn Signal Flasher Replacement .

Did you complete the repair?

Go to Step 9

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8

Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2