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Home / DTC / B2547 — Left Headlamp(High Beam) Short to Ground

B2547 — Left Headlamp(High Beam) Short to Ground

Detailed page for trouble code B2547.

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11,451generic
22,461specific
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Code

B2547

HYUNDAI B — Body

Left Headlamp(High Beam) Short to Ground

Brand: HYUNDAI
Type: B — Body
Views: UK: 21 EN: 27 RU: 22
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Page language: EN

Causes

  • Damaged wiring insulation with contact to chassis ground
  • Corroded or pushed-out connector pins/terminals
  • Water intrusion in headlamp assembly or connector
  • Faulty or shorted high-beam bulb or aftermarket bulb wiring
  • Melted/burned connector or wiring from previous overcurrent
  • Poor or shorted ground at nearby grounding point

Symptoms

  • Left high beam does not operate or is intermittent
  • Blown fuse or repeated fuse failure for headlamps
  • High beam warning or lamp-out message on dash
  • Left headlamp may be dim, flicker, or remain off while right beam is normal
  • Possible burning smell near wiring if overheating occurred

What to check

  • Retrieve freeze-frame/data and confirm B2547 recorded; note conditions when set
  • Visual inspection of left headlamp, connector, and harness for damage, corrosion, or moisture
  • Check fuses and relays related to headlamps for continuity and signs of overheating
  • Inspect and, if needed, remove the bulb to check for evidence of internal short
  • Wiggle-test harness and connector while observing lamp operation or scan-tool status
  • Measure voltage at the headlamp high-beam feed with connector connected and disconnected

Signal parameters

  • Expected voltage at high-beam feed with high beams ON: ~Battery voltage (~12–14.5 V)
  • Expected voltage at high-beam feed with high beams OFF: ~0 V (or near 0 if controlled to ground)
  • Typical current draw (halogen high-beam): roughly 3–6 A per lamp; LED values will be much lower (check lamp spec)
  • Continuity between feed and ground when fault present: close to 0 Ω (indicates short); when healthy: open or very high resistance

Diagnostic algorithm

  1. Verify the code with a scan tool and clear then re-run to confirm repeatability.
  2. Perform detailed visual inspection of left headlamp assembly, bulb, connector, and harness routing for abrasion, melting, or corrosion; repair any obvious damage.
  3. With ignition off, disconnect the left headlamp connector and measure resistance between the high-beam feed terminal and chassis ground. Low resistance indicates a short in the lamp or harness downstream.
  4. Remove the bulb and repeat the continuity test. If short clears with bulb removed, the bulb or its socket is likely faulty; replace and retest.
  5. If short remains with bulb removed, backprobe the harness side and trace toward the body control module, disconnecting intermediate connectors to isolate the short section.
  6. With the circuit isolated, use a fused jumper or ammeter to locate high current path if safe to do so; repair damaged wiring, replace burnt connectors, secure grounds, and protect harness routing.
  7. If harness and lamp appear good, test the headlamp relay/driver and BCM output using a scan tool or lab scope per manufacturer procedure. Replace module only after wiring and lamp are confirmed good.
  8. After repairs, clear codes, verify proper operation of left high beam under all expected conditions, and perform a road test or re-check freeze-frame data.

Likely causes

  • Chafed or pinched harness where it routes to the left headlamp
  • Corroded connector on the headlamp or harness side allowing pin-to-ground contact
  • Failed high-beam lamp (internal short) or incorrect aftermarket bulb
  • Water/dirt inside connector or lamp assembly creating a conductive path

Fault status

⚠️ Status
Left headlamp (high beam) circuit short to ground detected. Fault may cause left high beam inoperative, blown fuses, or driver/BCM protection intervention.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2546 B2548 B2550 B2600
371

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