Turn Signal Lamps and/or Indicators Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. 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: Master Electrical Component List in Wiring Systems |
|||
| 1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are all of the turn signals and indicators inoperative? | Go to Step 4 | Go to Step 5 |
| 4 | Press the hazard switch to the ON position. Do all of the hazard lamps operate? |
Go to Step 6 | Go to Step 14 |
| 5 | Are only the I/P turn signal indicators inoperative? | Go to Step 12 | Go to Step 8 |
| 6 |
|
Go to Step 13 | Go to Step 7 |
| 7 | Test for an open, poor connection or a short to battery positive voltage in the ground circuit of the turn signal switch. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 15 |
| 8 | Is only the hazard lamps inoperative? | Go to Hazard Lamps Inoperative | Go to Step 9 |
| 9 | Are both the front and rear turn signal lamps inoperative on one side? | Go to Step 10 | Go to Step 16 |
| 10 |
|
Go to Step 13 | Go to Step 11 |
| 11 | Test for a poor connection, open or a short to battery positive voltage in inoperative turn signal switch circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 15 |
| 12 |
IMPORTANT:
Perform the set up procedure for the I/P. Replace the instrument panel cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement
in Instrument Panel, Gages and Console.Did you complete the replacement and the set up procedure? |
Go to Step 21 | - |
| 13 | Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Is the replacement complete? |
Go to Step 21 | - |
| 14 | Test for a poor connection, an open or a short to ground in the Turn/Hazard Fuse circuit of the body control module (BCM). Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 15 |
| 15 |
IMPORTANT:
After replacing the BCM, perform the setup procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration
in Body Control System. Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the repair? |
Go to Step 21 | - |
| 16 |
|
Go to Step 17 | Go to Step 19 |
| 17 | Using a test lamp connected to the turn signal supply voltage circuit, probe the turn signal lamp ground circuit. Does the test lamp flash? |
Go to Step 20 | Go to Step 18 |
| 18 | Repair a poor connection, open or a short to battery positive voltage in the ground circuit of the turn signal lamp. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 21 | - |
| 19 | Test for a poor connection, open or a short to ground in the turn signal lamp voltage supply circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 15 |
| 20 | Replace the inoperative turn signal lamp. Did you complete the repair? |
Go to Step 21 | - |
| 21 |
|
System OK | Go to Step 3 |