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Home / DTC / B2535 — Right Turn Signal Lamp Short to Ground

B2535 — Right Turn Signal Lamp Short to Ground

Detailed page for trouble code B2535.

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22,491specific
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Code

B2535

HYUNDAI B — Body

Right Turn Signal Lamp Short to Ground

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

Causes

  • Damaged wiring or chafed insulation in right turn signal circuit
  • Corroded or bent pins at the lamp connector or BCM connector
  • Burned/shorted lamp socket or bulb (including aftermarket LED retrofit)
  • Poor or loose ground contact at the lamp or chassis
  • BCM internal fault or damaged output driver
  • Incorrect installation of trailer wiring or aftermarket accessories

Symptoms

  • Right front and/or right rear turn lamp does not light when commanded
  • Turn signal indicator may flash abnormally or not at all
  • Blown fuse or circuit protection on the turn lamp circuit
  • Other lighting functions on same circuit may be affected
  • Stored B2535 trouble code and related BCM warnings

What to check

  • Visually inspect right turn lamp, socket, lens, and wiring for damage or moisture
  • Check for blown fuses and proper fuse amperage
  • Remove bulb and operate turn signal to see if code clears or symptom changes
  • Measure voltage at lamp connector with turn signal ON (should be ~12 V) and at bulb removed
  • Check continuity/resistance from lamp positive pin to ground (should be open/infinite when bulb removed)
  • Inspect BCM connector pins for corrosion, damage, and proper seating

Signal parameters

  • Expected supply voltage on right turn output when ON: ~11–14 V
  • Expected open-circuit voltage on output when OFF: near 0 V or high impedance (depends on BCM design)
  • Typical incandescent bulb current: 0.5–3 A per lamp (varies by bulb); short to ground will show very low resistance and high current
  • Resistance of good bulb/socket circuit (bulb installed): low but finite (hundreds of ohms for LED, a few ohms for incandescent filament when cold)

Diagnostic algorithm

  1. Pull right turn bulb and visually inspect for broken filament, carbon tracking, or socket corrosion. Replace bulb with known good unit if doubtful.
  2. With bulb removed, activate right turn signal and check if BCM still reports short. If code/noise disappears, fault is at lamp or socket.
  3. Inspect and wiggle the wiring harness from the lamp back toward the vehicle body; look for chafing, pinches, or aftermarket splices. Repair damaged wiring and protect harness.
  4. Disconnect the lamp-side connector and measure resistance/continuity from the positive feed pin to chassis ground. A direct short (near 0 Ω) indicates wiring/connector short; open indicates lamp side is isolated.
  5. If short remains with lamp connector disconnected, trace toward BCM: unplug intermediate connectors and test sections to isolate short location.
  6. Check BCM connector for bent/corroded pins. If short exists at BCM harness but not at lamp, inspect ground routing and nearby components for contact.
  7. If wiring and connectors test good, perform BCM output driver tests per factory procedure (bench test or swap with known-good BCM if applicable). Replace BCM only after eliminating wiring and lamp faults.
  8. After repair, clear codes and perform functional test: verify correct operation, check for reappearance of code, and confirm no blown fuses.

Likely causes

  • Moisture/corrosion in right turn lamp connector causing short to ground
  • Lamp filament contacting housing or short inside socket
  • Wire chafed against metal near lamp or harness grommet
  • Aftermarket LED bulb without proper resistor causing BCM error
  • BCM output damage after repeated short/fuse events (less common)

Fault status

⚠️ Status
Right turn signal lamp circuit short to ground detected. BCM has logged B2535 due to abnormally low resistance or overcurrent on the right turn lamp output.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2536 B2530 B2545
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

B2535

Other B — Body

Right Rear Turn Lamp Circuit Failure

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

Causes

  • Damaged wiring or chafed insulation in right turn signal circuit
  • Corroded or bent pins at the lamp connector or BCM connector
  • Burned/shorted lamp socket or bulb (including aftermarket LED retrofit)
  • Poor or loose ground contact at the lamp or chassis
  • BCM internal fault or damaged output driver
  • Incorrect installation of trailer wiring or aftermarket accessories

Symptoms

  • Right front and/or right rear turn lamp does not light when commanded
  • Turn signal indicator may flash abnormally or not at all
  • Blown fuse or circuit protection on the turn lamp circuit
  • Other lighting functions on same circuit may be affected
  • Stored B2535 trouble code and related BCM warnings

What to check

  • Visually inspect right turn lamp, socket, lens, and wiring for damage or moisture
  • Check for blown fuses and proper fuse amperage
  • Remove bulb and operate turn signal to see if code clears or symptom changes
  • Measure voltage at lamp connector with turn signal ON (should be ~12 V) and at bulb removed
  • Check continuity/resistance from lamp positive pin to ground (should be open/infinite when bulb removed)
  • Inspect BCM connector pins for corrosion, damage, and proper seating

Signal parameters

  • Expected supply voltage on right turn output when ON: ~11–14 V
  • Expected open-circuit voltage on output when OFF: near 0 V or high impedance (depends on BCM design)
  • Typical incandescent bulb current: 0.5–3 A per lamp (varies by bulb); short to ground will show very low resistance and high current
  • Resistance of good bulb/socket circuit (bulb installed): low but finite (hundreds of ohms for LED, a few ohms for incandescent filament when cold)

Diagnostic algorithm

  1. Pull right turn bulb and visually inspect for broken filament, carbon tracking, or socket corrosion. Replace bulb with known good unit if doubtful.
  2. With bulb removed, activate right turn signal and check if BCM still reports short. If code/noise disappears, fault is at lamp or socket.
  3. Inspect and wiggle the wiring harness from the lamp back toward the vehicle body; look for chafing, pinches, or aftermarket splices. Repair damaged wiring and protect harness.
  4. Disconnect the lamp-side connector and measure resistance/continuity from the positive feed pin to chassis ground. A direct short (near 0 Ω) indicates wiring/connector short; open indicates lamp side is isolated.
  5. If short remains with lamp connector disconnected, trace toward BCM: unplug intermediate connectors and test sections to isolate short location.
  6. Check BCM connector for bent/corroded pins. If short exists at BCM harness but not at lamp, inspect ground routing and nearby components for contact.
  7. If wiring and connectors test good, perform BCM output driver tests per factory procedure (bench test or swap with known-good BCM if applicable). Replace BCM only after eliminating wiring and lamp faults.
  8. After repair, clear codes and perform functional test: verify correct operation, check for reappearance of code, and confirm no blown fuses.

Likely causes

  • Moisture/corrosion in right turn lamp connector causing short to ground
  • Lamp filament contacting housing or short inside socket
  • Wire chafed against metal near lamp or harness grommet
  • Aftermarket LED bulb without proper resistor causing BCM error
  • BCM output damage after repeated short/fuse events (less common)

Fault status

⚠️ Status
Right turn signal lamp circuit short to ground detected. BCM has logged B2535 due to abnormally low resistance or overcurrent on the right turn lamp output.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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