AutoCodes – Generic – B1D35

B1D35 Code - Hazard Switch

Quick Answer

The Body Control Module (BCM) monitors the Hazard Switch. Common causes include Faulty Hazard Switch, Hazard Switch harness is open or shorted, Hazard Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1D35 indicates Hazard Switch.
Common causes: Common causes include Faulty Hazard Switch, Hazard Switch harness is open or shorted, Hazard Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,750

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 28, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1D35 Description

The Body Control Module (BCM) monitors the Hazard Switch. The BCM sets the OBDII code when the Hazard Switch is not to factory specifications.

OBDII Code B1D35 - Hazard Switch - AutoCodes.com — B1D35 Code - Hazard Switch

What does this mean?

What are the Possible Causes of the DTC B1D35?

Faulty Hazard Switch
Hazard Switch harness is open or shorted
Hazard Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1D35?

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

What does this mean?

Code Tech Notes

B1D35:11 Hazard Switch Circuit Short to Ground
B1D35:23 Hazard Switch Signal Stuck Low

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1D35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1D35 code?

Need more information on how to fix the B1D35 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1D35 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1D35 Chrysler — Driver Mirror Heater Control Circuit Open
B1D35 Dodge — Driver Mirror Heater Control Circuit Open
B1D35 Ford — Hazard Switch
B1D35 Jeep — Driver Mirror Heater Control Circuit Open
B1D35 Lincoln — Hazard Switch
B1D35 Mercury — Hazard Switch
B1D35 RAM — Driver Mirror Heater Control Circuit Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1D35 Code

1. What does OBDII code B1D35 mean?

Code B1D35 refers to a malfunction in the hazard switch circuit, which is responsible for activating the vehicle's hazard warning lights.

2. What are the common symptoms of code B1D35?

Symptoms include hazard lights not turning on, hazard lights staying on continuously, or the hazard switch feeling stuck or unresponsive.

3. What causes the B1D35 code to appear?

Common causes include a faulty hazard switch, wiring issues such as shorts or open circuits, or a malfunction in the body control module (BCM).

4. Can I still drive with the B1D35 code?

Yes, but without functioning hazard lights, your ability to signal an emergency situation is compromised, which could be dangerous in certain conditions.

5. How do I diagnose the B1D35 code?

Start by inspecting the hazard switch and its wiring for visible damage. Use a multimeter to check for proper voltage and continuity in the circuit. A scan tool can also help confirm the code and pinpoint the fault.

6. How is the B1D35 code fixed?

Repairs may involve replacing the hazard switch, repairing damaged wiring, or reprogramming or replacing the body control module if necessary.

7. How much does it cost to fix the B1D35 code?

Repair costs can vary, but replacing a hazard switch typically costs $50-$150 for parts and labor. Wiring repairs or BCM replacements may cost more.

8. Can a blown fuse cause the B1D35 code?

Yes, a blown fuse in the hazard light circuit can disrupt functionality and trigger the B1D35 code.

9. Do I need a professional mechanic to fix the B1D35 code?

While some issues like replacing a hazard switch can be done by a DIYer, more complex electrical diagnostics or BCM repairs may require a professional.

10. Will clearing the B1D35 code with a scan tool fix the problem?

Clearing the code may temporarily remove it from the system, but if the underlying issue isnâ€™t resolved, the code will likely reappear.