AutoCodes – Mercury – B1D35 Mercury

B1D35 Mercury 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 Mercury 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 1,022

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

What does this mean?

What are the Possible Causes of the DTC B1D35 Mercury?

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 Mercury?

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 Mercury 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 Mercury code?

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

Need Help with the Code?

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

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 Mercury Code

1. What are the common symptoms of OBDII code B1D35 in a Mercury related to the Hazard Switch?

- Common symptoms include malfunctioning hazard lights, unresponsive hazard switch, and intermittent flashing of the hazard lights.

2. What is the usual cause of OBDII code B1D35 related to the Hazard Switch in a Mercury?

- The most common cause of this code is a faulty hazard switch or a wiring issue in the hazard light circuit.

3. How can I diagnose the OBDII code B1D35 in my Mercury's Hazard Switch?

- To diagnose this code, you can start by visually inspecting the hazard switch and its wiring for any visible damage. Testing the switch with a multimeter can also help determine if it's functioning properly.

4. Can I still drive my Mercury with OBDII code B1D35 related to the Hazard Switch?

- It is generally safe to drive the vehicle with this code, but it's important to address the issue promptly to ensure the hazard lights function correctly in emergency situations.

5. How can I repair OBDII code B1D35 on my Mercury caused by the Hazard Switch?

- The most effective repair is to replace the faulty hazard switch with a new one. Ensure the replacement switch is compatible with your Mercury model.

6. Are there any DIY tips for fixing OBDII code B1D35 related to the Hazard Switch in a Mercury?

- If you're comfortable with automotive repairs, you can attempt to replace the hazard switch yourself using basic tools and following a detailed guide specific to your Mercury model.

7. Will resetting the OBDII system clear the B1D35 code related to the Hazard Switch in my Mercury?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the Hazard Switch is not fixed, the code is likely to return.

8. Is it necessary to visit a mechanic for OBDII code B1D35 associated with the Hazard Switch in my Mercury?

- While it's possible to address this issue yourself, consulting a mechanic is recommended for proper diagnosis and repair, especially if you're unsure about working on electrical components.

9. Can extreme weather conditions affect the Hazard Switch in my Mercury and trigger OBDII code B1D35?

- Yes, extreme temperatures or moisture can sometimes cause electrical issues with the hazard switch, leading to the activation of OBDII code B1D35.

10. Is the Hazard Switch covered under any warranty for Mercury vehicles experiencing OBDII code B1D35?

- Depending on the warranty status of your Mercury vehicle, the Hazard Switch may be covered under the manufacturer's warranty or an extended warranty, so it's advisable to check with your dealership for coverage details.