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

DEFINITION: The right or left turn signal lamps are always illuminated and flashing.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Verify that the turn signal lever is not in the LEFT or RIGHT turn positions.
  2. Observe the turn signal lamps.

Are the turn signal lamps OFF?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Disconnect the turn signal/hazard switch connector C1.

Do the turn signal lamps illuminate and flash?

Go to Step 4

Go to Step 5

4

Test the turn input circuit of the appropriate side for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 7

Go to Step 6

5

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

Did you correct the complete the replacement?

Go to Step 7

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6

Replace the hazard flasher.

Did you complete the replacement?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3