B096A

DTC B096A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC B096A 02
- Hazard Lamps Switch Backlight Circuit Short to Ground

Diagnostic Fault Information






Circuit/System Description

When the dimmer switch is placed in a desired brightness position, voltage is applied through the dimmer switch resistor ladder to the BCM. The BCM interprets this voltage signal, then applies a pulse width modulated (PWM) voltage to the hazard switch LED illuminating it to the desired level of brightness.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The BCM detects a short to ground on the hazard LED dimming circuit.

Action Taken When the DTC Sets

The hazard switch LED will not be illuminated when the headlights are activated.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Reference Information
Schematic Reference

Exterior Lights Schematics Exterior Lights Schematics
Connector End View Reference

Component Connector End Views Connector End Views By Name
Description and Operation

Interior Lighting Systems Description and Operation Interior Lighting Systems
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Verification

Ignition ON, observe the function of the hazard switch LED while operating the dimmer switch from high to low. The hazard switch LED should change become dim and brighter as the switch is activated.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S48C multi-function switch 1 instrument panel.
2. Test for less than 30 ohm between the ground circuit terminal 7 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 5 and ground.
4. Ignition ON, vary the interior lamp dimming switch from dim to full bright. The test lamp should dim and then become full bright.

• If the test lamp does not dim, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
• If the test lamp is always OFF, test the control circuit for open/high resistance or short to ground. If the circuit tests normal, replace the K9 BCM.

5. If all circuits test normal, replace the S48C multi-function switch 1 instrument panel.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Instrument Panel Multifunction Switch Replacement Instrument Panel Multifunction Switch Replacement
* Control Module References Control Module Referencesfor BCM replacement, setup and programming