GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: The Turn Signals are always on with the ignition in run.

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 ON.
  2. Operate the turn signals.

Do the turn signals operate normally?

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

Go to Step 3

3

Is the turn lamp on steady?

Go to Step 4

Go to Step 5

4

Test for a short to voltage in the signal circuit to the lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the Turn Signal and Headlamp Dimmer and Windshield Wiper and Windshield washer Switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you find and correct the condition?

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3