Hazard Switch Circuit

HAZARD SWITCH CIRCUIT

Hazard Switch Circuit:

WHEN MONITORED
With the ignition on.

SET CONDITION
The Body Control Module (BCM) reports a short to power, ground, or an open on the Hazard Switch circuit.

POSSIBLE CAUSES
- Hazard switch circuit short to voltage
- Hazard switch circuit short to ground
- Hazard switch circuit open
- Body control module internal failure

DIAGNOSTIC TEST

1. MEASURE THE RESISTANCE OF THE HAZARD SWITCH CIRCUIT




Turn the ignition off.
Disconnect the BCM harness connector.
Disconnect the Console Switch Group harness connector.

NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Hazard Switch circuit between the BCM harness connector and the Console Switch Group harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 2
NO: Repair the Hazard Switch circuit for an open. Perform BODY VERIFICATION TEST. Body Verification Test

2. MEASURE THE VOLTAGE OF THE HAZARD SWITCH CIRCUIT




Turn the ignition on.
Measure the voltage of the Hazard Switch circuit between the Console Switch Group harness connector and Ground.

Q: Is voltage present?

YES: Repair the Hazard Switch circuit for a short to battery. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Go to 3

3. MEASURE THE RESISTANCE OF THE HAZARD SWITCH CIRCUIT




Turn the ignition off.
Measure the resistance of the Hazard Switch circuit between the Console Switch Group harness connector and ground.

Q: Is the resistance below 10K ohms?

YES: Repair the Hazard Switch circuit for a short to ground. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Replace the Body Control Module. Perform BODY VERIFICATION TEST. Body Verification Test