Turn Signal Lamps and/or Indicators Inoperative
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Turn Signal Lamps and/or Indicators Inoperative Diagnostic Test
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console or Power Door Systems Connector End Views in Doors |
|||
| 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 inoperative. Do the turn signal lamps and/or indicators 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 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
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 12 |
| 5 | Is only one turn signal lamp inoperative? | Go to Step 6 | Go to Step 8 |
| 6 | Test the inoperative bulb or tail lamp printed circuit board for an open or poor terminal contact. Refer to Circuit Testing
in Wiring Systems. Did you find a condition? |
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 or an open or high resistance in the turn signal lamp ground circuit. 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 |
| 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
in Wiring Systems:
Did you find and correct the condition? |
Go to Step 21 | Go to Step 10 |
| 10 |
|
Go to Step 11 | Go to Step 13 |
| 11 | Test the following circuits for an open, high resistance or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems:
Did you find and correct the condition? |
Go to Step 21 | Go to Step 14 |
| 12 | 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 21 | Go to Step 17 |
| 13 | 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 21 | Go to Step 19 |
| 14 | 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 21 | Go to Step 20 |
| 15 | Inspect for poor connections at the door module for the inoperative outside rear view mirror turn indicator. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 16 |
| 16 |
IMPORTANT:
Perform the set up procedure for the door module. Replace the door module for the inoperative outside rear view mirror turn indicator. Refer to Switch 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 21 | - |
| 17 |
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 21 | - |
| 18 | Replace the inoperative bulb or tail lamp printed circuit board. Refer to Tail Lamp Bulb Replacement or Tail Lamp Circuit Board Replacement . Did you complete the repair? |
Go to Step 21 | - |
| 19 | Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the repair? |
Go to Step 21 | - |
| 20 | Replace the hazard/turn flasher. 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 |