OBD Guide
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B1687

Lamp Dome Input Circuit Short To Battery

B1687 is an OBD-II diagnostic trouble code meaning: Lamp Dome Input Circuit Short To Battery. Common causes: short circuit in wiring harness, dome light switch malfunction. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • Dome light malfunction
  • Constantly lit dome light
  • Low battery

Causes

  • Short circuit in wiring harness
  • Dome light switch malfunction
  • Body Control Module (BCM) Problems
  • Damage to wire insulation

How to Fix

  1. Check the integrity of the dome light wiring harness
  2. Check dome light switch
  3. Check BCM status
  4. Replace damaged wires or components

Related codes

B1685B1686B1688

FAQ

What does the B1687 code mean?

B1687 is an OBD-II diagnostic trouble code that indicates: Lamp Dome Input Circuit Short To Battery

What causes a B1687 error code?

The most common causes of B1687 include: Short circuit in wiring harness; Dome light switch malfunction; Body Control Module (BCM) Problems; Damage to wire insulation.

How do I fix a B1687 diagnostic trouble code?

To fix B1687: Check the integrity of the dome light wiring harness. Check dome light switch. Check BCM status. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1687?

Limited driving only, diagnose soon

How much does it cost to fix B1687?

The estimated repair cost for B1687 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat