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AutoCodes - Generic - B3596

B3596 Code - Hazard Lamps Request Circuit Malfunction

- Code Popularity: 2,672 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B3596?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Turn Signal/Multifunction Switch
  • Turn Signal/Multifunction Switch harness is open or shorted
  • Turn Signal/Multifunction Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)
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How to Fix the DTC B3596?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3596 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B3596 Description

The hazard flashers may be activated in any power mode. The hazard warning switch signal circuit is momentarily grounded when the hazard warning switch is pressed. The Body Control Module (BCM) responds to the hazard warning switch signal input by supplying battery voltage to all four turn signal lamps in an ON and OFF duty cycle. When the hazard warning switch is activated, the BCM sends a serial data message to the instrument cluster requesting both turn signal indicators to be cycled ON and OFF. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the hazard warning switch signal circuit.

OBDII Code B3596 - Hazard Lamps Request Circuit Malfunction - AutoCodes.com
B3596 Code - Hazard Lamps Request Circuit Malfunction

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