For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Component Connector End Views .
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle .
2 |

1. Ignition ON, engine OFF.
2. Activate the right and left turn signal lamps.

Do the turn signal lamps and indicators operate correctly?

Go to Testing for Intermittent Conditions and Poor Connections .

Go to Step 3

3 |

1. Place the turn signal switch in the OFF position.
2. Place the hazard warning switch in the OFF position.

Are only the turn signal indicators always ON?

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement .

Go to Step 4

4 | Are all 4 of the turn signals lamps flashing? | Go to Hazard Lamps Always On . | Go to Step 5
5 | Is only one lamp on at all times? | Go to Step 6 | Go to Step 7
6 | Test for a short to battery positive voltage in the turn signal voltage circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | System OK | Replace the body control module (BCM), driver door switch, or passenger door switch as applicable. Refer to Control Module References , for replacement, setup, and programming.
7 | Disconnect the turn signal switch. Do the turn signal lamps turn off? | Replace the turn signal switch. Refer to Turn Signal Switch Replacement . | Go to Step 8
8 | Test for a short to ground in the either turn signal switch signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | System OK | Replace the body control module (BCM), driver door switch, or passenger door switch as applicable. Refer to Control Module References , for replacement, setup, and programming.