Hazards light relay location

Good afternoon,

The hazard flasher is inside the body control module. It is not separate like the old days. A signal is sent from the hazard switch to the BCM and the module turns on and flashes the lights.

Does touching the switch make any difference?

You will need an advanced scan tool to monitor the BCM and see if it is a signal issue or BCM issue.

Roy

Normal Operation
The Body Control Module (BCM) sends a voltage signal to the Front Controls Interface Module (FCIM) for the hazard lamp function input. When the hazard flasher lamp switch is touched, the voltage signal is routed to ground, indicating a request for the hazard lamp function. When the BCM (Body Control Module) detects a request for the hazard lamps, on/off voltage is provided to all of the turn lamps.
The hazard flasher lamp switch is a capacitive touch switch and is integrated into the FCIM (Front Controls Interface Module).

DTC B1D35:11 (Hazard Switch: Circuit Short to Ground) - a DTC that sets when the BCM (Body Control Module) detects a short to ground from the hazard lamp function input circuit.

Turn Signal and Hazard Lamps

Pinpoint Tests

Pinpoint Test V: The Hazard Lamp Function Is Inoperative/Always On

Normal Operation
The Body Control Module (BCM) sends a voltage signal to the Front Controls Interface Module (FCIM) for the hazard lamp function input. When the hazard flasher lamp switch is touched, the voltage signal is routed to ground, indicating a request for the hazard lamp function. When the BCM (Body Control Module) detects a request for the hazard lamps, on/off voltage is provided to all of the turn lamps.
The hazard flasher lamp switch is a capacitive touch switch and is integrated into the FCIM (Front Controls Interface Module).

DTC B1D35:11 (Hazard Switch: Circuit Short to Ground) - a DTC that sets when the BCM (Body Control Module) detects a short to ground from the hazard lamp function input circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors

FCIM (Front Controls Interface Module)

BCM (Body Control Module)
PINPOINT TEST V : THE HAZARD LAMP FUNCTION IS INOPERATIVE/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
V1 CHECK THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST

Check the recorded DTCs from the BCM (Body Control Module) self-test.

Is DTC B1D35:11 present?

Yes GO to V2.
No GO to V4.

V2 ISOLATE THE FCIM (Front Controls Interface Module) AS THE CAUSE OF DTC B1D35:11

Ignition OFF.

Disconnect:FCIM (Front Controls Interface Module)C2402.

Ignition ON.

Enter the following diagnostic mode on the scan tool:BCM (Body Control Module) Self-Test.

Repeat the BCM (Body Control Module) self-test.

Is DTC B1D35:11 still present?

Yes GO to V3.
No GO to V6.

V3 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect:BCM (Body Control Module)C2280B.

Measure the resistance between the FCIM (Front Controls Interface Module)C2402-4, circuit CLS32 (BN/YE), harness side and ground.

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Is the resistance greater than 10,000 ohms?

Yes GO to V7.
No REPAIR circuit CLS32 (BN/YE) for a short to ground. TEST the system for normal operation.

V4 CHECK FOR A VOLTAGE SIGNAL TO THE FCIM (Front Controls Interface Module)

Disconnect:FCIM (Front Controls Interface Module)C2402.

Ignition OFF.

Measure the voltage between the FCIM (Front Controls Interface Module)C2402-4, circuit CLS32 (BN/YE), harness side and ground.

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Is the voltage greater than 10 volts?

Yes GO to V6.
No GO to V5.

V5 CHECK THE HAZARD FLASHER LAMP REQUEST INPUT CIRCUIT FOR AN OPEN

Disconnect:BCM (Body Control Module)C2280B.

Measure the resistance between the BCM (Body Control Module)C2280B-32, circuit CLS32 (BN/YE), harness side and the FCIM (Front Controls Interface Module)C2402-4, circuit CLS32 (BN/YE), harness side.

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Is the resistance less than 5 ohms?

Yes GO to V7.
No REPAIR circuit CLS32 (BN/YE) for an open. TEST the system for normal operation.

V6 CHECK FOR CORRECT FCIM (Front Controls Interface Module) OPERATION

Disconnect all the FCIM (Front Controls Interface Module) connectors.

Check for:
corrosion

damaged pins

pushed-out pins

Connect all the FCIM (Front Controls Interface Module) connectors and make sure they seat correctly.

Operate the system and verify the concern is still present.

Is the concern still present?

Yes INSTALL a new FCIM (Front Controls Interface Module). REFER to Accessories and Optional Equipment or Audio Systems (depending on its usage). TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

V7 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

Disconnect all the BCM (Body Control Module) connectors.

Check for:
corrosion

damaged pins

pushed-out pins

Connect all the BCM (Body Control Module) connectors and make sure they seat correctly.

Operate the system and verify the concern is still present.

Is the concern still present?

Yes INSTALL a new BCM (Body Control Module). REFER to Section 419-10. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

BCM

1. Connect a battery charger. Refer to Section 414-01 See: Battery > Removal and Replacement > Battery.

2. NOTE: This step is necessary only if the BCM (Body Control Module) is being replaced.
Upload the module configuration information from the BCM (Body Control Module). Refer to Section 418-01 See: Information Bus > Testing and Inspection.

3. Remove the steering column opening trim panel. Refer to Instrument Cluster / Carrier &/or Interior Moulding / Trim.

4. Disconnect the 7 BCM (Body Control Module) electrical connectors and remove the 2 harness pushpins from the BCM (Body Control Module).

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5. Lift the BCM (Body Control Module) release tab (away from the BCM (Body Control Module) bracket), slide the BCM (Body Control Module) to the left and remove.

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Installation

1. Install the BCM (Body Control Module) and connect the electrical connectors.

2. NOTE: If the BCM (Body Control Module) was not replaced, this is the last step that is necessary.

Install the steering column opening trim panel.

3. NOTE: If the ignition is left in RUN or ACC and the engine is OFF during the vehicle battery charging process, the Battery Monitoring System (BMS) can turn off the ignition causing the configuration to fail.

After battery charging is complete, carry out the BMS (Battery Monitoring System) reset by following the scan tool on screen instructions.

4. NOTE: Once the BCM (Body Control Module) Programmable Module Installation (PMI) is complete, follow the scan tool on-screen instructions for performing the Configurable Engine Immobilizer (CEI) lock configuration.
Carry out PMI (Programmable Module Installation) for the BCM (Body Control Module) See: Information Bus > Programming and Relearning > Programmable Module Installation (PMI). Refer to Section 418-01 See: Information Bus > Programming and Relearning > Programmable Module Installation (PMI).

5. If not equipped with IA (Intelligent Access), program the keys. Refer to Section 419-01B.

6. Carry out the parameter reset procedure. Refer to Section 419-01B. See: Antitheft and Alarm Systems > Programming and Relearning > Passive Anti-Theft System (PATS) Parameter Reset

7. If equipped with IA (Intelligent Access), carry out the keyless entry keypad code reset. Refer to Keyless Entry Keypad Code Programming. See: Keyless Entry Transmitter > Programming and Relearning > Keyless Entry Keypad Code Programming

8. Train the tire pressure sensors. Refer to Section 204-04 See: Wheels and Tires > Mechanical > Wheels and Tires.

9. NOTE: If the dome lamps are flashing after BCM (Body Control Module) installation, it was not configured completely. Repeat steps 3 through 7.

Carry out the BCM (Body Control Module) self-test to confirm all DTCs have been cleared.