For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Verify that the hazard lamps are always ON. Do the hazard lamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Ensure that the hazard lamp switch is in the OFF position.
2. With a scan tool, observe the Hazard Lamp Switch data parameter in the body control module (BCM) data list.

Does the scan tool display Active?

Go to Step 4

Go to Step 5

4 | Test the hazard switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 9 | Go to Step 6
5 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 9 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the hazard switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 9 | Go to Step 8
7 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the repair? | Go to Step 9 | --
8 | Replace the hazard switch. Refer to Hazard Warning Switch Replacement . Did you complete the repair? | Go to Step 9 | --
9 |

1. Use the scan tool in order to clear any induced DTCs.
2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3