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Home / DTC / B2567 — Rear Fog Lamp Short to Ground

B2567 — Rear Fog Lamp Short to Ground

Detailed page for trouble code B2567.

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Code

B2567

HYUNDAI B — Body

Rear Fog Lamp Short to Ground

Brand: HYUNDAI
Type: B — Body
Views: UK: 8 EN: 14 RU: 9
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or chafed wiring harness contacting chassis ground
  • Corroded or water-intruded rear fog lamp connector or bulb socket
  • Shorted aftermarket accessory or improper repair wiring tapped into the fog lamp circuit
  • Failed rear fog lamp bulb with internal short
  • Failed or damaged Body Control Module (BCM) / Lamp control relay (less common)
  • Blown or weak fuse repeatedly caused by the short

Symptoms

  • Rear fog lamp does not operate
  • Blown fuse for rear lighting or repeated fuse failures
  • Rear fog lamp warning or lamp-out message on dash (if equipped)
  • Other rear lamp circuits may be affected if fused together
  • Visible corrosion, burn marks, or melted insulation near rear fog lamp harness

What to check

  • Visually inspect rear fog lamp assembly, bulb and connector for corrosion, water, or damage
  • Check relevant fuse(s) for the rear fog lamp and replace if blown; note if it blows again
  • Disconnect the rear fog lamp connector and inspect terminals for short or bent pins
  • With connector disconnected, measure resistance/continuity between the fog lamp power pin and chassis ground to confirm short
  • Perform a voltage check at the fog lamp power feed with the switch ON (connector disconnected) — expect battery voltage if no short
  • Inspect wiring routing for rubbing points near body panels, bumper, hinges or fasteners

Signal parameters

  • Normal feed voltage at fog lamp connector with switch ON: ~11–14 V (battery voltage)
  • Expected lamp filament resistance (depends on lamp type): typically low ohms (approximately 1–30 Ω) when connected — verify against replacement lamp spec
  • Circuit short-to-ground: near 0 Ω (very low resistance) between feed and ground with connector connected and fuse removed
  • Typical lamp current draw at 12 V: roughly 0.5–3 A depending on bulb wattage; significantly higher current indicates a short

Diagnostic algorithm

  1. Record freeze-frame data and note fuse number(s).
  2. With ignition OFF, visually inspect the rear fog lamp, bulb, socket, and harness for corrosion, water, melted insulation, or damage. Disconnect connector and inspect terminals.
  3. Check and replace the rear fog lamp fuse if blown. If it blows immediately upon replacement with switch OFF, suspect wiring short or incorrect fuse location — remove accessories before further testing.
  4. With connector disconnected, use a multimeter to check for continuity between the fog lamp feed circuit and chassis ground. A low resistance (near 0 Ω) indicates a short to ground in the harness or a module fault.
  5. With ignition ON and switch to fog lamp ON, measure voltage at the fog lamp feed pin with the connector disconnected. Presence of battery voltage indicates the BCM is driving the feed and the short is downstream; no voltage may indicate BCM/relay issue.
  6. Install a known-good bulb on the bench and measure its resistance/current to compare against expected values. Reinstall a known-good bulb into the vehicle only after harness checks.
  7. If a short is confirmed on the harness side, perform a pin-to-pin isolation by disconnecting connectors along the harness (work from lamp back toward BCM) and re-check continuity to ground to localize the short location.
  8. Inspect common failure points: bumper area, tailgate hinge, grommets, and any splice points or aftermarket taps. Repair or replace damaged wiring/connector as required.
  9. After repair, clear codes, replace fuse, and verify proper operation of rear fog lamp and that the code does not return.
  10. Safety note: disconnect battery before performing wiring repairs and avoid leaving fused circuits powered during isolation tests.

Likely causes

  • Corrosion or water entry in rear fog lamp connector causing low resistance to ground
  • Wiring rubbed through on a pinch point or near the rear bumper mounting/hinge
  • Bulb socket terminals bent or touching ground/metalwork
  • Aftermarket trailer wiring or accessory incorrectly connected to the fog lamp circuit

Fault status

⚠️ Status
BCM detected a low-resistance (short-to-ground) condition on the rear fog lamp circuit. The fault may be intermittent or permanent; inspect lamp, connector, wiring, fuses, and related control circuits.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours
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Code

B2567

Other B — Body

Reverse Mirror Output Circuit Failure

Brand: Other
Type: B — Body
Views: UK: 12 EN: 23 RU: 15
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or chafed wiring harness contacting chassis ground
  • Corroded or water-intruded rear fog lamp connector or bulb socket
  • Shorted aftermarket accessory or improper repair wiring tapped into the fog lamp circuit
  • Failed rear fog lamp bulb with internal short
  • Failed or damaged Body Control Module (BCM) / Lamp control relay (less common)
  • Blown or weak fuse repeatedly caused by the short

Symptoms

  • Rear fog lamp does not operate
  • Blown fuse for rear lighting or repeated fuse failures
  • Rear fog lamp warning or lamp-out message on dash (if equipped)
  • Other rear lamp circuits may be affected if fused together
  • Visible corrosion, burn marks, or melted insulation near rear fog lamp harness

What to check

  • Visually inspect rear fog lamp assembly, bulb and connector for corrosion, water, or damage
  • Check relevant fuse(s) for the rear fog lamp and replace if blown; note if it blows again
  • Disconnect the rear fog lamp connector and inspect terminals for short or bent pins
  • With connector disconnected, measure resistance/continuity between the fog lamp power pin and chassis ground to confirm short
  • Perform a voltage check at the fog lamp power feed with the switch ON (connector disconnected) — expect battery voltage if no short
  • Inspect wiring routing for rubbing points near body panels, bumper, hinges or fasteners

Signal parameters

  • Normal feed voltage at fog lamp connector with switch ON: ~11–14 V (battery voltage)
  • Expected lamp filament resistance (depends on lamp type): typically low ohms (approximately 1–30 Ω) when connected — verify against replacement lamp spec
  • Circuit short-to-ground: near 0 Ω (very low resistance) between feed and ground with connector connected and fuse removed
  • Typical lamp current draw at 12 V: roughly 0.5–3 A depending on bulb wattage; significantly higher current indicates a short

Diagnostic algorithm

  1. Record freeze-frame data and note fuse number(s).
  2. With ignition OFF, visually inspect the rear fog lamp, bulb, socket, and harness for corrosion, water, melted insulation, or damage. Disconnect connector and inspect terminals.
  3. Check and replace the rear fog lamp fuse if blown. If it blows immediately upon replacement with switch OFF, suspect wiring short or incorrect fuse location — remove accessories before further testing.
  4. With connector disconnected, use a multimeter to check for continuity between the fog lamp feed circuit and chassis ground. A low resistance (near 0 Ω) indicates a short to ground in the harness or a module fault.
  5. With ignition ON and switch to fog lamp ON, measure voltage at the fog lamp feed pin with the connector disconnected. Presence of battery voltage indicates the BCM is driving the feed and the short is downstream; no voltage may indicate BCM/relay issue.
  6. Install a known-good bulb on the bench and measure its resistance/current to compare against expected values. Reinstall a known-good bulb into the vehicle only after harness checks.
  7. If a short is confirmed on the harness side, perform a pin-to-pin isolation by disconnecting connectors along the harness (work from lamp back toward BCM) and re-check continuity to ground to localize the short location.
  8. Inspect common failure points: bumper area, tailgate hinge, grommets, and any splice points or aftermarket taps. Repair or replace damaged wiring/connector as required.
  9. After repair, clear codes, replace fuse, and verify proper operation of rear fog lamp and that the code does not return.
  10. Safety note: disconnect battery before performing wiring repairs and avoid leaving fused circuits powered during isolation tests.

Likely causes

  • Corrosion or water entry in rear fog lamp connector causing low resistance to ground
  • Wiring rubbed through on a pinch point or near the rear bumper mounting/hinge
  • Bulb socket terminals bent or touching ground/metalwork
  • Aftermarket trailer wiring or accessory incorrectly connected to the fog lamp circuit

Fault status

⚠️ Status
BCM detected a low-resistance (short-to-ground) condition on the rear fog lamp circuit. The fault may be intermittent or permanent; inspect lamp, connector, wiring, fuses, and related control circuits.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours
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