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Home / DTC / B2524 — Brake Lamp Open | Turn Signal RH Front Circuit Short to Ground

B2524 — Brake Lamp Open | Turn Signal RH Front Circuit Short to Ground

Detailed page for trouble code B2524.

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Code

B2524

HYUNDAI B — Body

Brake Lamp Open | Turn Signal RH Front Circuit Short to Ground

Brand: HYUNDAI
Type: B — Body
Views: UK: 18 EN: 30 RU: 23
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Burned-out or broken filament bulb
  • Corroded or loose lamp socket or connector
  • Damaged wiring harness (chafing, pinched, broken insulation)
  • Short to ground at right front turn signal wiring or connector
  • Poor or missing ground at lamp circuit
  • Water ingress in lamp assembly or connector

Symptoms

  • Right-front turn signal not illuminating or intermittent
  • Brake lamp not illuminating on brake application or intermittent
  • Turn signal flash rate abnormal or fail indicator on dash
  • Malfunction indicator or lamp-out warning on instrument cluster
  • Possible blown fuse if short is severe

What to check

  • Visually inspect RH front lamp, socket and connector for damage, corrosion and water
  • Check rear brake lamp bulb(s) and sockets for broken filaments and proper seating
  • Verify fuses related to exterior lamps are intact
  • With lamp connector disconnected, check if the fault code clears (helps isolate lamp vs. harness/BCM)
  • Wiggle test wiring harness around RH front lamp while observing lamp operation and code status
  • Inspect ground points for tightness and corrosion near front lamp and BCM

Signal parameters

  • Normal battery voltage at lamp connector with circuits powered: ~12–14.5 V
  • Brake lamp: steady 12 V on brake application (no pulsing)
  • Turn signal RH: switched/pulsed ~1 Hz when activated, present as 12 V pulses when good
  • Open-circuit result: infinite resistance (OL) between lamp contact and supply
  • Short-to-ground result: near 0 V at lamp positive terminal with continuity to chassis ground

Diagnostic algorithm

  1. Record freeze frame/state and any additional lamp codes. Note which functions fail and when.
  2. Visually inspect RH front lamp assembly, bulb, socket and connector for damage, corrosion and moisture. Replace bulb if filament broken.
  3. With ignition ON, measure voltage at the RH front lamp connector positive terminal: with connector connected, activate turn signal; with connector disconnected, check if voltage appears at harness. If voltage is present at disconnected harness and reads ~0 V when connected, suspect short at lamp or grounded wiring.
  4. Check continuity from the harness positive terminal to chassis ground. If low resistance/continuity to ground with connector disconnected, locate and repair short in wiring (inspect harness along routing, junctions, and connectors).
  5. For brake lamp open: verify voltage at brake lamp connector while an assistant presses brake pedal. If no voltage, trace back for open circuit, bad fuse, relay, or BCM output. If voltage present at connector but lamp not lighting, replace bulb/socket.
  6. If wiring harness and lamp check good, isolate by disconnecting BCM output (refer to wiring diagram) and test output driver for proper switching using a multimeter or lab scope. Replace BCM if driver is confirmed faulty and wiring is good.
  7. After repairs, clear codes, test all lamp functions (turn signals, brake lamps) and re-check for returning codes. Reinspect any repaired wiring for strain relief and proper sealing.

Likely causes

  • RH front turn signal wiring contacting chassis ground (insulation damaged)
  • Brake lamp filament open or poor contact in socket
  • Corrosion/water in RH front lamp connector causing intermittent short/open
  • Connector terminal pushed out or bent causing open/short
  • BCM driver channel failure (less common)

Fault status

⚠️ Status
BCM reports Brake Lamp Open and Right-Front Turn Signal Circuit Short to Ground. Inspect right-front lamp, brake lamp(s), connectors, wiring harness and BCM outputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Code

B2524

Other B — Body

License Lamp Circuit Short to Battery

Brand: Other
Type: B — Body
Views: UK: 26 EN: 31 RU: 29
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Burned-out or broken filament bulb
  • Corroded or loose lamp socket or connector
  • Damaged wiring harness (chafing, pinched, broken insulation)
  • Short to ground at right front turn signal wiring or connector
  • Poor or missing ground at lamp circuit
  • Water ingress in lamp assembly or connector

Symptoms

  • Right-front turn signal not illuminating or intermittent
  • Brake lamp not illuminating on brake application or intermittent
  • Turn signal flash rate abnormal or fail indicator on dash
  • Malfunction indicator or lamp-out warning on instrument cluster
  • Possible blown fuse if short is severe

What to check

  • Visually inspect RH front lamp, socket and connector for damage, corrosion and water
  • Check rear brake lamp bulb(s) and sockets for broken filaments and proper seating
  • Verify fuses related to exterior lamps are intact
  • With lamp connector disconnected, check if the fault code clears (helps isolate lamp vs. harness/BCM)
  • Wiggle test wiring harness around RH front lamp while observing lamp operation and code status
  • Inspect ground points for tightness and corrosion near front lamp and BCM

Signal parameters

  • Normal battery voltage at lamp connector with circuits powered: ~12–14.5 V
  • Brake lamp: steady 12 V on brake application (no pulsing)
  • Turn signal RH: switched/pulsed ~1 Hz when activated, present as 12 V pulses when good
  • Open-circuit result: infinite resistance (OL) between lamp contact and supply
  • Short-to-ground result: near 0 V at lamp positive terminal with continuity to chassis ground

Diagnostic algorithm

  1. Record freeze frame/state and any additional lamp codes. Note which functions fail and when.
  2. Visually inspect RH front lamp assembly, bulb, socket and connector for damage, corrosion and moisture. Replace bulb if filament broken.
  3. With ignition ON, measure voltage at the RH front lamp connector positive terminal: with connector connected, activate turn signal; with connector disconnected, check if voltage appears at harness. If voltage is present at disconnected harness and reads ~0 V when connected, suspect short at lamp or grounded wiring.
  4. Check continuity from the harness positive terminal to chassis ground. If low resistance/continuity to ground with connector disconnected, locate and repair short in wiring (inspect harness along routing, junctions, and connectors).
  5. For brake lamp open: verify voltage at brake lamp connector while an assistant presses brake pedal. If no voltage, trace back for open circuit, bad fuse, relay, or BCM output. If voltage present at connector but lamp not lighting, replace bulb/socket.
  6. If wiring harness and lamp check good, isolate by disconnecting BCM output (refer to wiring diagram) and test output driver for proper switching using a multimeter or lab scope. Replace BCM if driver is confirmed faulty and wiring is good.
  7. After repairs, clear codes, test all lamp functions (turn signals, brake lamps) and re-check for returning codes. Reinspect any repaired wiring for strain relief and proper sealing.

Likely causes

  • RH front turn signal wiring contacting chassis ground (insulation damaged)
  • Brake lamp filament open or poor contact in socket
  • Corrosion/water in RH front lamp connector causing intermittent short/open
  • Connector terminal pushed out or bent causing open/short
  • BCM driver channel failure (less common)

Fault status

⚠️ Status
BCM reports Brake Lamp Open and Right-Front Turn Signal Circuit Short to Ground. Inspect right-front lamp, brake lamp(s), connectors, wiring harness and BCM outputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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