AutoCodes – Mercury – B1008 Mercury

B1008 Mercury Code - Wiper Mode Switch Signal Stuck Low

Quick Answer

The Body Control Module (BCM) monitors the Wiper Mode Switch. Common causes include Faulty Wiper Mode Switch, Wiper Mode Switch harness is open or shorted, Wiper Mode Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1008 Mercury indicates Wiper Mode Switch Signal Stuck Low.
Common causes: Common causes include Faulty Wiper Mode Switch, Wiper Mode Switch harness is open or shorted, Wiper Mode Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,005

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1008 Mercury Description

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

OBDII Code B1008 Mercury - Wiper Mode Switch Signal Stuck Low - AutoCodes.com — B1008 Mercury Code - Wiper Mode Switch Signal Stuck Low

What does this mean?

What are the Possible Causes of the DTC B1008 Mercury?

Faulty Wiper Mode Switch
Wiper Mode Switch harness is open or shorted
Wiper Mode Switch circuit poor electrical connection

How to Fix the DTC B1008 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1008 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 B1008 Mercury code?

Need more information on how to fix the B1008 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1008 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 B1008 Mercury Code

1. What are the common symptoms of OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

The common symptoms include the wiper system not responding to switch commands, wipers getting stuck in one position, or the wipers operating erratically.

2. What can cause the OBDII code B1008 (Mercury) to be triggered?

The code B1008 is typically triggered when the Body Control Module (BCM) detects a low signal from the wiper mode switch, indicating a potential issue with the switch or its circuit.

3. How can I diagnose the cause of OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

Diagnosing the issue involves checking the wiper mode switch for proper operation, inspecting the wiring and connectors for any damage or corrosion, and testing the BCM for faults related to the wiper control circuit.

4. Can a faulty wiper mode switch cause the OBDII code B1008 (Mercury) to appear?

Yes, a faulty wiper mode switch that is stuck in the low position can trigger the B1008 code, indicating a problem with the signal being received by the BCM.

5. How serious is the OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

While the code itself may not affect the drivability of the vehicle, it can lead to inconvenience and safety concerns due to wiper system malfunctions. It is advisable to address the issue promptly.

6. What are some repair tips for resolving OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

Repair tips include checking and potentially replacing the wiper mode switch, inspecting and repairing any damaged wiring or connectors, and resetting the BCM to clear the code.

7. Can a DIY enthusiast fix the OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and fix this issue by following the repair tips and procedures outlined in the vehicle's service manual.

8. Is it necessary to clear the OBDII code B1008 (Mercury) after repairing the wiper mode switch issue?

Yes, it is recommended to clear the code after repairing the wiper mode switch issue to reset the BCM and ensure that the problem has been resolved successfully.

9. How can regular maintenance help prevent the recurrence of OBDII code B1008 (Mercury) - Wiper Mode Switch Signal Stuck Low?

Regularly checking the wiper system, including the mode switch and wiring, for any signs of wear or damage can help prevent issues that may trigger the B1008 code in the future.

10. Should I seek professional help if I am unable to diagnose or repair the OBDII code B1008 (Mercury) on my own?

If you are unable to diagnose or repair the issue on your own, or if you lack the necessary tools and expertise, it is advisable to seek professional help from a qualified mechanic or technician to address the problem effectively.