B2586 High Beams Are Inoperative

• OBD2 Code: B2586
• Description: High beams are inoperative.
• Definition: This code indicates a malfunction in the vehicle’s high beam circuit, which may be due to a faulty headlight switch, wiring issues, or a problem with the high beam relay. The result is that the high beams do not function as intended.

B2586: High beams are inoperative
– Severity: Moderate

Common Causes

B2586 – High beams are inoperative

Common causes:

• Faulty high beam bulbs
• Defective high beam switch
• Blown fuse for high beams
• Wiring issues in the high beam circuit

 

Common Misdiagnosis

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OBD2 Code: B2586

Description: High Beams Are Inoperative

Common Misdiagnosis: Faulty high beam bulbs or fuses are often misdiagnosed as the cause, while the actual issue may be related to a malfunctioning headlight switch or wiring problems.

 

Common Diagnostic Steps

OBD2 Code: B2586
Description: High Beams Inoperative
Common Diagnostic Steps:

• Check the high beam bulbs for any signs of damage or burnout.
• Inspect the fuses related to the high beam circuit and replace if necessary.
• Examine the high beam relay for proper operation and replace if faulty.
• Test the high beam switch on the steering column for continuity and correct function.
• Inspect wiring and connectors in the high beam circuit for corrosion, damage, or loose connections.
• Use a multimeter to check voltage at various points in the circuit to ensure power is reaching the bulbs.
• If equipped with a Body Control Module (BCM), scan for additional codes that may indicate a BCM issue affecting high beams.