Turn Signal Lamps and/or Indicators Inoperative
Turn Signal Lamps and/or Indicators Inoperative
| 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 | Are only the turn signal indicators inoperative? | Go to Step 14 | Go to Step 4 |
| 4 | Does at least one turn signal on both sides operate properly? | Go to Step 9 | Go to Step 5 |
| 5 | Are all turn signals inoperative? | Go to Step 6 | Go to Step 8 |
| 6 | Using a scan tool, command the turn signals ON and OFF. Do the turn signals illuminate when commanded? |
Go to Step 7 | Go to Step 13 |
| 7 | Test the ground circuit of the turn signal switch for high resistance or an open. Did you find and correct the condition? |
Go to Step 20 | Go to Step 12 |
| 8 |
|
Go to Step 12 | Go to Step 15 |
| 9 |
|
Go to Step 10 | Go to Step 16 |
| 10 | Test the ground circuit of the inoperative lamp for high resistance, or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 11 |
| 11 | Test the supply voltage circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
Go to Step 20 | Go to Step 12 |
| 12 | 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
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 17 |
| 13 | 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
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 18 |
| 14 | 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
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 19 |
| 15 | Repair the high resistance or open in the inoperative turn signal switch signal circuit of the BCM Refer to Wiring Repairs . | Go to Step 20 | - |
| 16 | Replace the bulb. Refer to Park/Turn Signal Lamp Bulb Replacement . Did you complete the replacement? |
Go to Step 20 | - |
| 17 | Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement
. Did you complete the replacement? |
Go to Step 20 | - |
| 18 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 20 | - |
| 19 | Replace the IPC. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 20 | - |
| 20 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |