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Home / DTC / B2583 — Rear LH Tail And LH/RH License Lamp Circuit Short To Ground

B2583 — Rear LH Tail And LH/RH License Lamp Circuit Short To Ground

Detailed page for trouble code B2583.

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11,841generic
22,491specific
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Code

B2583

HYUNDAI B — Body

Rear LH Tail And LH/RH License Lamp Circuit Short To Ground

Brand: HYUNDAI
Type: B — Body
AI status
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Page language: EN

Causes

  • Damaged or chafed wiring harness (abrasion, pinched, or cut) to LH tail/license lamps
  • Corroded, bent or bridged terminals at lamp connector or ground
  • Shorted lamp bulb or internal lamp module failure (LED driver shorted)
  • Incorrect lamp or replacement bulb with wrong rating
  • Poor or loose ground at body or lamp mounting
  • Faulty BCM or wiring short inside BCM (less common)

Symptoms

  • Rear left tail lamp may not illuminate or may be dim/intermittent
  • License plate lamp(s) may not work or show erratic behavior
  • Bulb fuse may blow repeatedly (if fused separately)
  • Warning lamp or message on dash indicating lamp circuit issue
  • Possible parasitic drain on battery when lights are on

What to check

  • Retrieve freeze-frame/data and clear DTC then re-run to see if code returns
  • Visually inspect LH rear lamp assembly, connector, wiring harness through trunk, hinge, and nearby body panels
  • Check lamp bulbs or LED assemblies for corrosion, water, or physical damage
  • Inspect related fuses and relays for continuity and correct rating
  • Backprobe connector to check for voltage and ground presence with lights on/off
  • Measure resistance between the circuit wire and chassis ground with connector disconnected

Signal parameters

  • Expected lamp circuit voltage: ~12 V (battery) when tail lights on; 0 V when off
  • Short-to-ground condition: near 0 V at circuit when circuit should be open or >1 A current draw to ground
  • Typical incandescent tail/plate bulb resistance: ~2–20 Ω cold (current 0.5–2 A). LED modules: much higher resistance/constant-current driver behavior — current typically 0.05–0.5 A
  • Open circuit: very high resistance (kΩ to infinity). Ground continuity: near 0 Ω to chassis ground

Diagnostic algorithm

  1. OBTAIN DTC and vehicle information: confirm B2583 and record lamp operation conditions (tail, park, license)
  2. VISUAL INSPECTION: open trunk, remove LH tail lamp bezel/assembly and inspect connector, wiring, bulb or LED module for corrosion, water, damaged insulation, or pinched wires.
  3. REMOVE LAMP/CONNECTOR: disconnect the LH tail/license lamp connector. With vehicle lights OFF, measure resistance between lamp positive pin and chassis ground — a short will show near 0 Ω.
  4. ISOLATE LAMP ASSEMBLY: if resistance is near zero with connector disconnected, bench-test the lamp assembly (apply 12 V through a fused jumper) — a short indicates internal lamp/LED failure; replace assembly if so.
  5. IF LAMP IS GOOD: with assembly disconnected, use an ohmmeter to trace wiring from connector back along harness toward body control module/ground. Wiggle harness, inspect through trunk hinge and grommets for chafing.
  6. BACKPROBE WITH POWER ON: reconnect battery, turn tail lights ON, backprobe the lamp feed: confirm ~12 V at the connector pin when lamp on. If voltage is low or near 0 V and short present, measure current (use fused ammeter) to find high draw point.
  7. CHECK GROUNDS: verify nearby chassis ground points and ground wire at lamp for corrosion and tightness; measure voltage drop between ground at lamp and chassis while lights on — should be
  8. REPAIR: repair or replace damaged wiring, repair connector terminals, replace lamp assembly or bulb as required. Use heat-shrink, dielectric grease, and proper grommets when routing through hinges.
  9. VERIFY: clear DTC, operate lights and cycle doors, then confirm code does not return and lamps function normally.
  10. IF UNRESOLVED: inspect/control module side wiring and BCM connector for internal shorts. Consider BCM replacement or professional electrical diagnosis only after wiring and lamp assembly are confirmed good.

Likely causes

  • Chafed wire where harness passes through trunk hinge or rear quarter panel
  • Water intrusion at lamp connector causing corrosion and a short to ground
  • Damaged lamp socket or broken insulation at connector
  • Aftermarket trunk liner or accessories pierced wiring harness

Fault status

⚠️ Status
BCM detected a short to ground on the rear left tail and license lamp circuit. Circuit is pulling current to ground when it should be open or at regulated voltage; lamps may be inoperative or intermittent.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B2584 B2582 B2573 B2531
371

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