Turn Signal Lamps and/or Indicators Always On or Flashing
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Turn Signal Lamps and/or Indicators Always On or Flashing
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System. |
|||
| 1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
| 3 | Test the appropriate turn signal bulb supply voltage circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 4 |
| 4 |
|
Go to Step 5 | Go to Step 6 |
| 5 | Test the appropriate turn signal switch signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the turn signal/hazard flasher module. Refer to Testing for Intermittent Conditions and Poor Connections
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the turn/hazard switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 8 | Replace the turn signal/hazard flasher module. Did you complete the replacement? |
Go to Step 10 | - |
| 9 | Replace the multifunction, turn signal and hazard switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 10 | - |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |