Turn Signal Lamps and/or Indicators Always On or Flashing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. 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 |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 |
|
Go to Step 11 | 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? |
Go to Step 12 | Go to Step 9 |
| 7 | Disconnect the multifunction turn signal switch. Do the turn signal lamps turn OFF? |
Go to Step 10 | 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? |
Go to Step 12 | Go to Step 9 |
| 9 | 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. Did you complete the replacement? |
Go to Step 12 | - |
| 10 | Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement
. Did you complete the replacement? |
Go to Step 12 | - |
| 11 | Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement (Cadillac)
or Instrument Cluster Replacement (Except Cadillac)
. Did you complete the repair? |
Go to Step 12 | - |
| 12 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |