AutoCodes – Generic – B1687

B1687 Code - Lamp Dome Input Circuit Short To Battery

Quick Answer

The Body Control Module (BCM) monitors the Lamp Dome Switch. Common causes include Faulty Lamp Dome Switch, Lamp Dome Switch harness is open or shorted, Lamp Dome 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: B1687 indicates Lamp Dome Input Circuit Short To Battery.
Common causes: Common causes include Faulty Lamp Dome Switch, Lamp Dome Switch harness is open or shorted, Lamp Dome 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 9,086

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 Jun 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1687 Description

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

OBDII Code B1687 - Lamp Dome Input Circuit Short To Battery - AutoCodes.com — B1687 Code - Lamp Dome Input Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1687?

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

How to Fix the DTC B1687?

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 B1687 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 B1687 code?

Need more information on how to fix the B1687 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1687 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 B1687 Code

1. What are the common symptoms of OBDII code B1687 (Lamp Dome Input Circuit Short To Battery)?

- Common symptoms include the dome light not working, interior lights flickering, or a dashboard warning light indicating a circuit issue.

2. What can cause the OBDII code B1687 to trigger?

- The code B1687 is typically triggered by a short circuit in the dome light wiring or a fault in the interior light control module.

3. How can I diagnose the cause of OBDII code B1687?

- To diagnose the issue, you can start by checking the dome light bulb and its wiring for any visible damage or shorts. You may also need to inspect the interior light control module for faults.

4. Is it safe to continue driving with OBDII code B1687 active?

- It is generally safe to continue driving with this code, but it is recommended to address the issue promptly to avoid any potential electrical problems in the future.

5. Can I repair OBDII code B1687 myself?

- If you have experience with automotive electrical systems, you may be able to repair the issue yourself by fixing the wiring or replacing the faulty components. Otherwise, it is advisable to seek professional help.

6. Will OBDII code B1687 affect the overall performance of my vehicle?

- While the code itself may not affect the performance of the vehicle, it can lead to electrical issues if left unresolved, which may impact the overall functionality of the interior lighting system.

7. How much does it cost to repair OBDII code B1687?

- The cost of repairing OBDII code B1687 can vary depending on the extent of the damage and whether you choose to DIY or seek professional help. It may range from a simple wiring fix to replacing the interior light control module.

8. Can a dead battery cause OBDII code B1687 to appear?

- A dead or weak battery can sometimes cause electrical issues in the vehicle, including triggering OBDII code B1687. It is recommended to check the battery's condition as part of troubleshooting.

9. Are there any preventive measures to avoid OBDII code B1687 in the future?

- Regularly checking and maintaining the interior lighting system, including the dome light and associated wiring, can help prevent issues that may lead to OBDII code B1687.

10. How long does it typically take to repair OBDII code B1687?

- The repair time for OBDII code B1687 can vary based on the complexity of the issue and the availability of parts. Simple fixes may take a short time, while more involved repairs may require additional labor.