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Home / DTC / B2545 — Right Head Lamp(High Beam) Circuit Open

B2545 — Right Head Lamp(High Beam) Circuit Open

Detailed page for trouble code B2545.

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22,491specific
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Code

B2545

HYUNDAI B — Body

Right Head Lamp(High Beam) Circuit Open

Brand: HYUNDAI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Burned-out or disconnected right high-beam bulb
  • Corroded or loose headlamp connector or socket
  • Open or damaged wiring between lamp and control module
  • Blown fuse or faulty relay for headlamp/high-beam circuit
  • Poor or missing ground at headlamp assembly
  • Faulty body control module (BCM) or headlamp control module

Symptoms

  • Right high beam does not illuminate while left high beam works
  • Dashboard high-beam indicator may behave normally or show a fault
  • Reduced night visibility on the right side
  • Related DTC(s) stored and possibly a warning message

What to check

  • Scan vehicle to confirm DTC B2545 and view freeze-frame / related codes
  • Visually inspect right headlamp, bulb, connector and wiring for damage or corrosion
  • Check related fuses and headlamp relay
  • Operate high beams and measure voltage at the headlamp connector
  • Perform continuity/ohms check between lamp connector and control module pin
  • Inspect and test ground at headlamp assembly

Signal parameters

  • Voltage at headlamp connector with high beam ON: ~11–14 V (battery voltage)
  • Voltage with high beam OFF: ~0 V (or near 0 V depending on circuit design)
  • High-beam filament resistance (halogen): typically low ohms (approx. 0.5–5 Ω) — check bulb specs
  • Expected current draw for halogen high beam: roughly 2–8 A (varies by bulb type)
  • Continuity between lamp connector and BCM pin: near 0 Ω (open = infinite Ω)

Diagnostic algorithm

  1. Use a scan tool: read & record DTCs and freeze-frame data. Clear codes and see if B2545 returns.
  2. Turn off ignition and visually inspect the right headlamp bulb, socket and wiring for obvious damage, corrosion, or detached connectors. Replace bulb if visibly failed.
  3. With assistant switching high beams ON, back-probe the headlamp connector and measure voltage. If ~12 V present at connector and bulb is good, suspect poor connection at bulb or ground.
  4. If no voltage at connector when commanded ON, check in-line fuse(s) and headlamp relay. Verify relay operation and voltage at both sides of the relay when commanded.
  5. Perform continuity test from the headlamp connector hot pin back to the control module pin with ignition OFF. An open indicates a wiring break; repair wiring or connector as required.
  6. Check ground continuity from headlamp ground terminal to chassis/ECU ground. Repair any high-resistance grounds.
  7. If wiring and connectors are good and proper voltages are present but lamp still fails, replace the lamp/assembly. If problem persists after replacing lamp and repairing wiring, suspect BCM/headlamp control module and consult manufacturer procedures before replacement.
  8. After repairs, clear codes, re-test high beam operation and road/test as required to verify the fault is resolved.

Likely causes

  • Failed high-beam bulb filament or lamp assembly
  • Loose/corroded connector or broken wire at the lamp
  • Blown fuse or failed headlamp relay
  • Open/short in the wiring harness or damaged ground
  • Control module fault (less common after wiring verified)

Fault status

⚠️ Status
Right Head Lamp (High Beam) Circuit Open — control module detects an open circuit or no load on the right high-beam output. Inspect bulb, connectors, fuses/relay, wiring and ground before considering module replacement.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2540 B2541 B2542 B2570 B2590
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

B2545

Other B — Body

System Power Relay Circuit Short to Battery

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Burned-out or disconnected right high-beam bulb
  • Corroded or loose headlamp connector or socket
  • Open or damaged wiring between lamp and control module
  • Blown fuse or faulty relay for headlamp/high-beam circuit
  • Poor or missing ground at headlamp assembly
  • Faulty body control module (BCM) or headlamp control module

Symptoms

  • Right high beam does not illuminate while left high beam works
  • Dashboard high-beam indicator may behave normally or show a fault
  • Reduced night visibility on the right side
  • Related DTC(s) stored and possibly a warning message

What to check

  • Scan vehicle to confirm DTC B2545 and view freeze-frame / related codes
  • Visually inspect right headlamp, bulb, connector and wiring for damage or corrosion
  • Check related fuses and headlamp relay
  • Operate high beams and measure voltage at the headlamp connector
  • Perform continuity/ohms check between lamp connector and control module pin
  • Inspect and test ground at headlamp assembly

Signal parameters

  • Voltage at headlamp connector with high beam ON: ~11–14 V (battery voltage)
  • Voltage with high beam OFF: ~0 V (or near 0 V depending on circuit design)
  • High-beam filament resistance (halogen): typically low ohms (approx. 0.5–5 Ω) — check bulb specs
  • Expected current draw for halogen high beam: roughly 2–8 A (varies by bulb type)
  • Continuity between lamp connector and BCM pin: near 0 Ω (open = infinite Ω)

Diagnostic algorithm

  1. Use a scan tool: read & record DTCs and freeze-frame data. Clear codes and see if B2545 returns.
  2. Turn off ignition and visually inspect the right headlamp bulb, socket and wiring for obvious damage, corrosion, or detached connectors. Replace bulb if visibly failed.
  3. With assistant switching high beams ON, back-probe the headlamp connector and measure voltage. If ~12 V present at connector and bulb is good, suspect poor connection at bulb or ground.
  4. If no voltage at connector when commanded ON, check in-line fuse(s) and headlamp relay. Verify relay operation and voltage at both sides of the relay when commanded.
  5. Perform continuity test from the headlamp connector hot pin back to the control module pin with ignition OFF. An open indicates a wiring break; repair wiring or connector as required.
  6. Check ground continuity from headlamp ground terminal to chassis/ECU ground. Repair any high-resistance grounds.
  7. If wiring and connectors are good and proper voltages are present but lamp still fails, replace the lamp/assembly. If problem persists after replacing lamp and repairing wiring, suspect BCM/headlamp control module and consult manufacturer procedures before replacement.
  8. After repairs, clear codes, re-test high beam operation and road/test as required to verify the fault is resolved.

Likely causes

  • Failed high-beam bulb filament or lamp assembly
  • Loose/corroded connector or broken wire at the lamp
  • Blown fuse or failed headlamp relay
  • Open/short in the wiring harness or damaged ground
  • Control module fault (less common after wiring verified)

Fault status

⚠️ Status
Right Head Lamp (High Beam) Circuit Open — control module detects an open circuit or no load on the right high-beam output. Inspect bulb, connectors, fuses/relay, wiring and ground before considering module replacement.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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