For 1990-2009 cars

## Turn Signal Indicator Inoperative - Left Side Oldsmobile

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check
2 |

1. Turn the ignition switch ON.
2. Turn the left turn signal on.
3. Connect scan tool.
4. Select IPC Input Menu (Oldsmobile). Select DIM Input Menu (Pontiac, Buick).

Does the left turn signal input indicate ON and OFF with the cycling of the turn signal?

--

Go to Step 3

Go to Exterior Lights System Check

3 | Replace the instrument panel cluster (IPC). Refer to IP Cluster Replacement. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --

## Turn Signal Indicator Inoperative - Left Side Buick and Pontiac

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check
2 | Do the turn signals function properly? | -- | Go to Step 3 | Go to Exterior Lights System Check
3 |

1. Disconnect instrument cluster connector C1.
2. Inspect CKT14 (LT BLU) for an open or short to ground.

Is the wiring OK.

--

Go toStep 4

Go toStep 5

4 | Replace the instrument panel cluster (IPC). Refer to IP Cluster Replacement. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
5 | Repair the wiring. Is the repair complete? | -- | Go to Instrument Cluster System Check | --