Turn Signal Lamps and/or Indicators Inoperative
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Turn Signal Lamps and/or Indicators Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication 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 turn signal lamps and/or indicators are inoperative. Do the turn signal lamps and/or indicators operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative? | Go to Step 4 | Go to Step 5 |
| 4 | Test the inoperative turn signal supply voltage circuit to the IPC for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 13 |
| 5 | Is only one turn signal lamp inoperative? | Go to Step 6 | Go to Step 8 |
| 6 | Inspect the inoperative bulb/socket for an internal short, poor terminal contact, or an open filament. Was a problem found? |
Go to Step 18 | Go to Step 7 |
| 7 | Test for an open, high resistance, or short to ground in the turn signal lamp supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 16 |
| 8 | Inspect the IGN E fuse and the FLASHER fuse. Is either fuse open? |
Go to Step 11 | Go to Step 9 |
| 9 | Test for an open or high resistance in the following circuits:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
Go to Step 21 | Go to Step 10 |
| 10 |
|
Go to Step 12 | Go to Step 14 |
| 11 | Test the following circuits for a short to ground:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
Go to Step 21 | Go to Step 14 |
| 12 | Test the following circuits for an open or high resistance:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
Go to Step 21 | Go to Step 15 |
| 13 | Inspect for poor connections at the IPC. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 17 |
| 14 | Inspect for poor connections at the multifunction turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 19 |
| 15 | Inspect for poor connections at the turn signal/hazard flasher module. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 20 |
| 16 | Repair the ground circuit of the inoperative lamp. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 21 | - |
| 17 | Replace the IPC. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
Go to Step 21 | - |
| 18 | Replace or repair the inoperative bulb/socket. Did you complete the repair? |
Go to Step 21 | - |
| 19 | Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement
. Did you complete the repair? |
Go to Step 21 | - |
| 20 | Replace the turn signal/hazard flasher module. Refer to Hazard and Turn Signal Flasher Replacement . Did you complete the repair? |
Go to Step 21 | - |
| 21 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |