Turn Signal Lamps and/or Indicators Always On or Flashing
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 | |||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Verify that the turn signal lamps and/or indicators are always on or flashing. Do the turn signal lamps operate normally? |
Go to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS in Wiring Systems | Go to Step 3 |
| 3 | Are only the turn signal indicators in the IP cluster always on or flashing? | Go to Step 9 | Go to Step 4 |
| 4 | Are only the turn signal lamps on one side of the vehicle always on or flashing? | Go to Step 5 | Go to Step 7 |
| 5 | Inspect the affected bulb/socket for an internal short, poor terminal contact, or a shorted filament. Was a problem found? |
Go to Step 14 | Go to Step 6 |
| 6 | Test the following circuits of the affected lamps 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 18 | Go to Step 7 |
| 7 | Disconnect the multifunction turn signal switch. Do the affected turn signals and indicators still illuminate? |
Go to Step 8 | Go to Step 10 |
| 8 | Disconnect the front door module on the same side as the affected lamps. Do some of the affected turn signal lamps and indicators still illuminate? |
Go to Step 11 | Go to Step 12 |
| 9 | Inspect for poor connections at the IPC. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 13 |
| 10 | Inspect for poor connections at the multifunction turn signal switch. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 15 |
| 11 | Inspect for poor connections at the turn/hazard flasher. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 16 |
| 12 | Inspect for poor connections at the front door module on the same side as the affected lamps. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 17 |
| 13 |
IMPORTANT:
Perform the set up procedure for the IPC. Replace the IPC. Refer to INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT
in Instrument Panel, Gages, and Console.Did you complete the repair? |
Go to Step 18 | - |
| 14 | Replace or repair the affected bulb/socket. Did you complete the repair? |
Go to Step 18 | - |
| 15 | Replace the multifunction turn signal switch. Refer to MULTIFUNCTION, TURN SIGNAL & HAZARD SWITCH
in Steering Wheel and Column. Did you complete the repair? |
Go to Step 18 | - |
| 16 | Replace the hazard/turn flasher. Refer Hazard and Turn Signal Flasher Replacement . Did you complete the repair? |
Go to Step 18 | - |
| 17 |
IMPORTANT:
Perform the set up procedure for the door module. Replace the door module for the inoperative outside rear view mirror turn indicator. Refer toSWITCH REPLACEMENT - DOOR LOCK AND SIDE WINDOW - DRIVER
or SWITCH REPLACEMENT - DOOR LOCK AND SIDE WINDOW - PASSENGER
in Doors.Did you complete the repair? |
Go to Step 18 | - |
| 18 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |