B2537

Code

HYUNDAI B — Body

Right Turn Signal Lamp Open

Brand: HYUNDAI

Type: B — Body

Views: UK: 14 EN: 22 RU: 14

AI status

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Page language: EN

Causes

Burned-out or failed bulb/LED unit
Broken/open wiring between lamp and Body Control Module (BCM)
Corroded, loose or damaged lamp socket or connector
Poor or broken ground at lamp assembly
Blown fuse or faulty relay in the lighting circuit
Faulty BCM or lamp driver output (less common)

Symptoms

Right turn signal lamp (front and/or rear) does not illuminate when signalling right turn
Turn signal indicator on dash may not light or may flash irregularly (hyperflash or no flash)
Hazard lamps may show different behavior for the right side only
No voltage present at right lamp socket when turn signal is commanded

What to check

Visually inspect right front and rear turn lamp bulbs or LED modules for damage or failure
Activate right turn signal and observe which lamps light (front/rear/dash)
Check related fuses and relays in fuse box (consult vehicle manual)
Inspect lamp socket and connector for corrosion, bent pins, moisture, or loose fit
Use a scan tool to read BCM for related codes and to command the right turn lamp ON/OFF if available
Measure voltage at the lamp socket with turn signal commanded (use back-probing)

Signal parameters

Voltage at socket when commanded: approx. 12 V (vehicle battery voltage)
No voltage or intermittent voltage indicates open/disconnect or BCM driver issue
Typical incandescent bulb current: ~0.5–3 A (varies by lamp); LED modules draw significantly less (e.g., 50–300 mA)
Expected low series resistance in bulb filament when cold; open (infinite) indicates bulb failure or open wiring
Ground resistance to chassis should be very low (

Diagnostic algorithm

Confirm the symptom: activate right turn signal and note which lamp(s) do not light
Visually inspect and, if incandescent, remove and inspect the bulb filament; replace with a known-good bulb or swap with the left side bulb to test
With turn signal ON, back-probe the lamp socket: verify battery voltage at the hot terminal and good ground at the ground terminal
If no voltage at socket, trace wiring from socket to connector: inspect connectors for corrosion, damaged pins, or pushed-out terminals
Check continuity between the lamp socket and BCM output pin; repair any open circuit or damaged wiring
Inspect and test related fuses/relays; replace if blown or faulty
If wiring and lamp are good but no output from BCM when commanded, use a scan tool to command the output and confirm BCM operation; check for BCM power/ground and related body ECU codes
Repair or replace the faulty component found (lamp, wiring, connector, fuse, relay, or BCM). Clear codes and retest the system to confirm repair

Likely causes

Failed bulb or LED unit
Open/disconnected wiring or detached connector at right turn lamp
Corroded socket or poor ground at right lamp
Blown fuse or related relay
BCM/lamp driver fault (if wiring and lamp verified good)

Fault status

⚠️ Status

Right turn signal lamp circuit open — circuit did not present expected load/voltage when commanded. Possible bulb, wiring/connector, ground, fuse, or BCM driver fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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