Turn Signal Lamps and/or Indicators Always On or Flashing
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are only the turn signal indicators always ON? | Go to Step 10 | Go to Step 4 |
| 4 | Is only one lamp on at all times? | Go to Step 5 | Go to Step 6 |
| 5 | Test for a short to voltage in the appropriate turn signal supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 8 |
| 6 | Disconnect the multifunction turn signal switch. Do the turn signal lamps turn off? |
Go to Step 9 | Go to Step 7 |
| 7 | Test for a short to ground in the appropriate turn signal switch signal circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 8 |
| 8 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the multifunction turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 10 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 11 | Replace the BCM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
Go to Step 14 | - |
| 12 | Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the IPC. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |