OBD Guide
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B1503

Lamp Turn Signal Right Circuit Failure

B1503 is an OBD-II diagnostic trouble code meaning: Lamp Turn Signal Right Circuit Failure. Common causes: burnt out turn signal lamp, open or short circuit in wiring harness. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Right turn signal does not work
  • The right indicator blinks at a different frequency or does not blink
  • The malfunction indicator on the dashboard is on

Causes

  • Burnt out turn signal lamp
  • Open or short circuit in wiring harness
  • Faulty turn signal relay
  • Poor contact in the headlight or relay connector
  • Problems with the body control module

How to Fix

  1. Check the turn signal lamp for burnout
  2. Inspect the wiring harness and connectors for damage
  3. Check turn signal relay
  4. Diagnose the body control unit if necessary
  5. Replace faulty components and clear error code

Related codes

B1501B1502B1504

FAQ

What does the B1503 code mean?

B1503 is an OBD-II diagnostic trouble code that indicates: Lamp Turn Signal Right Circuit Failure

What causes a B1503 error code?

The most common causes of B1503 include: Burnt out turn signal lamp; Open or short circuit in wiring harness; Faulty turn signal relay; Poor contact in the headlight or relay connector.

How do I fix a B1503 diagnostic trouble code?

To fix B1503: Check the turn signal lamp for burnout. Inspect the wiring harness and connectors for damage. Check turn signal relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1503?

Limited driving only, diagnose soon

How much does it cost to fix B1503?

The estimated repair cost for B1503 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat