Code
B1510
ALFA ROMEO
B — Body
Hazard flasher switch circuit short to ground
Views:
UK: 7
EN: 10
RU: 6
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring contacting chassis ground
- Corroded, bent or damaged connector pins at the hazard switch or BCM/relay module
- Failed hazard flasher switch (internal short)
- Faulty flasher/relay/module (internal short in output stage)
- Aftermarket equipment or repair that spliced into the circuit incorrectly
- Water ingress or corrosion in steering column or switch area
Symptoms
- Hazard lights do not operate or operate intermittently
- Turn signals may be affected or not function correctly
- Blown fuse(s) on hazard/indicator circuit
- Possible battery drain if short is permanent
- Related warning lamp on dash or stored body module faults
- Clicking/flasher noise absent when hazards selected
What to check
- Retrieve freeze-frame data and confirm stored DTC and any related codes with a scan tool
- Visual inspection of hazard switch, connectors, and wiring for damage, corrosion or pinching
- Check relevant fuses and fuse holders for continuity and proper rating
- Inspect for aftermarket taps or recent repairs in the dash/steering column area
- Disconnect hazard switch connector and check if DTC clears or symptom changes (use caution)
- Measure voltage at switch supply and output with a multimeter before and after disconnect
Signal parameters
- Supply voltage at hazard switch supply pin: about battery voltage (12–14.5 V) with ignition ON
- Output/switch pin when activated: pulsed between ~0 V and ~12 V (flashing duty) when functioning
- Output/switch pin when OFF: open/high-impedance (no battery voltage; not shorted to ground)
- Resistance from output pin to chassis ground: Open/very high resistance when circuit is healthy; near 0 Ω indicates a short to ground
- Expected continuity: closed switch to module side only when switch actuated; otherwise no continuity to ground
Diagnostic algorithm
- Record the code and any related codes using a diagnostic scanner. Note vehicle conditions when code set.
- Visually inspect hazard switch, steering column area, instrument panel harness and relevant connectors for damage, corrosion or water ingress.
- Check relevant fuses for continuity and correct amperage. Replace blown fuses only after finding root cause of short.
- With ignition OFF, disconnect the hazard switch connector. Clear the code and then re-check by attempting to operate hazards and scanning for code return.
- If code does not return with switch disconnected, probe the switch wiring harness with a multimeter for short to ground: measure resistance from the suspect output wire(s) to chassis ground. Near 0 Ω indicates short.
- With ignition ON, backprobe the supply pin to confirm battery voltage. Backprobe output pin and operate hazard switch; a healthy circuit will show pulsed voltage when active. If output is held near 0 V (ground) regardless, suspect a short or failed switch/module.
- Isolate wiring by disconnecting connectors progressively (steering column, junction blocks, BCM) to locate the section with the short. Use continuity or voltage-drop tests while isolating.
- Inspect and repair any damaged wiring, pin repairs, or replace corroded connectors. If wiring is intact and short persists, bench-test or replace the hazard switch and/or flasher/body control module as per factory procedure.
- After repair, restore connectors, replace any fuses, clear codes, and verify proper hazard and turn-signal operation. Re-scan to confirm no reoccurrence.
- Advise retest drive/use and re-check for intermittent faults over time if repair was wiring-related.
Likely causes
- Shorted or pinched wire in the steering column harness where the hazard switch wiring passes
- Faulty hazard flasher switch with internal short to ground
- Corroded/loose connector causing a grounded pin at the switch or control module
- Short in wiring near connectors (e.g., behind dash) after recent work or component replacement
Fault status
Status
Hazard flasher switch circuit shorted to ground detected; hazard lamps may be inoperative and related fuses may blow.
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
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Code
B1510
FIAT
B — Body
Hazard flasher switch circuit short to ground
Views:
UK: 6
EN: 8
RU: 3
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring contacting chassis ground
- Corroded, bent or damaged connector pins at the hazard switch or BCM/relay module
- Failed hazard flasher switch (internal short)
- Faulty flasher/relay/module (internal short in output stage)
- Aftermarket equipment or repair that spliced into the circuit incorrectly
- Water ingress or corrosion in steering column or switch area
Symptoms
- Hazard lights do not operate or operate intermittently
- Turn signals may be affected or not function correctly
- Blown fuse(s) on hazard/indicator circuit
- Possible battery drain if short is permanent
- Related warning lamp on dash or stored body module faults
- Clicking/flasher noise absent when hazards selected
What to check
- Retrieve freeze-frame data and confirm stored DTC and any related codes with a scan tool
- Visual inspection of hazard switch, connectors, and wiring for damage, corrosion or pinching
- Check relevant fuses and fuse holders for continuity and proper rating
- Inspect for aftermarket taps or recent repairs in the dash/steering column area
- Disconnect hazard switch connector and check if DTC clears or symptom changes (use caution)
- Measure voltage at switch supply and output with a multimeter before and after disconnect
Signal parameters
- Supply voltage at hazard switch supply pin: about battery voltage (12–14.5 V) with ignition ON
- Output/switch pin when activated: pulsed between ~0 V and ~12 V (flashing duty) when functioning
- Output/switch pin when OFF: open/high-impedance (no battery voltage; not shorted to ground)
- Resistance from output pin to chassis ground: Open/very high resistance when circuit is healthy; near 0 Ω indicates a short to ground
- Expected continuity: closed switch to module side only when switch actuated; otherwise no continuity to ground
Diagnostic algorithm
- Record the code and any related codes using a diagnostic scanner. Note vehicle conditions when code set.
- Visually inspect hazard switch, steering column area, instrument panel harness and relevant connectors for damage, corrosion or water ingress.
- Check relevant fuses for continuity and correct amperage. Replace blown fuses only after finding root cause of short.
- With ignition OFF, disconnect the hazard switch connector. Clear the code and then re-check by attempting to operate hazards and scanning for code return.
- If code does not return with switch disconnected, probe the switch wiring harness with a multimeter for short to ground: measure resistance from the suspect output wire(s) to chassis ground. Near 0 Ω indicates short.
- With ignition ON, backprobe the supply pin to confirm battery voltage. Backprobe output pin and operate hazard switch; a healthy circuit will show pulsed voltage when active. If output is held near 0 V (ground) regardless, suspect a short or failed switch/module.
- Isolate wiring by disconnecting connectors progressively (steering column, junction blocks, BCM) to locate the section with the short. Use continuity or voltage-drop tests while isolating.
- Inspect and repair any damaged wiring, pin repairs, or replace corroded connectors. If wiring is intact and short persists, bench-test or replace the hazard switch and/or flasher/body control module as per factory procedure.
- After repair, restore connectors, replace any fuses, clear codes, and verify proper hazard and turn-signal operation. Re-scan to confirm no reoccurrence.
- Advise retest drive/use and re-check for intermittent faults over time if repair was wiring-related.
Likely causes
- Shorted or pinched wire in the steering column harness where the hazard switch wiring passes
- Faulty hazard flasher switch with internal short to ground
- Corroded/loose connector causing a grounded pin at the switch or control module
- Short in wiring near connectors (e.g., behind dash) after recent work or component replacement
Fault status
Status
Hazard flasher switch circuit shorted to ground detected; hazard lamps may be inoperative and related fuses may blow.
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
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Code
B1510
MITSUBISHI
B — Body
RL curtain ABG squib short
Views:
UK: 8
EN: 15
RU: 14
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring contacting chassis ground
- Corroded, bent or damaged connector pins at the hazard switch or BCM/relay module
- Failed hazard flasher switch (internal short)
- Faulty flasher/relay/module (internal short in output stage)
- Aftermarket equipment or repair that spliced into the circuit incorrectly
- Water ingress or corrosion in steering column or switch area
Symptoms
- Hazard lights do not operate or operate intermittently
- Turn signals may be affected or not function correctly
- Blown fuse(s) on hazard/indicator circuit
- Possible battery drain if short is permanent
- Related warning lamp on dash or stored body module faults
- Clicking/flasher noise absent when hazards selected
What to check
- Retrieve freeze-frame data and confirm stored DTC and any related codes with a scan tool
- Visual inspection of hazard switch, connectors, and wiring for damage, corrosion or pinching
- Check relevant fuses and fuse holders for continuity and proper rating
- Inspect for aftermarket taps or recent repairs in the dash/steering column area
- Disconnect hazard switch connector and check if DTC clears or symptom changes (use caution)
- Measure voltage at switch supply and output with a multimeter before and after disconnect
Signal parameters
- Supply voltage at hazard switch supply pin: about battery voltage (12–14.5 V) with ignition ON
- Output/switch pin when activated: pulsed between ~0 V and ~12 V (flashing duty) when functioning
- Output/switch pin when OFF: open/high-impedance (no battery voltage; not shorted to ground)
- Resistance from output pin to chassis ground: Open/very high resistance when circuit is healthy; near 0 Ω indicates a short to ground
- Expected continuity: closed switch to module side only when switch actuated; otherwise no continuity to ground
Diagnostic algorithm
- Record the code and any related codes using a diagnostic scanner. Note vehicle conditions when code set.
- Visually inspect hazard switch, steering column area, instrument panel harness and relevant connectors for damage, corrosion or water ingress.
- Check relevant fuses for continuity and correct amperage. Replace blown fuses only after finding root cause of short.
- With ignition OFF, disconnect the hazard switch connector. Clear the code and then re-check by attempting to operate hazards and scanning for code return.
- If code does not return with switch disconnected, probe the switch wiring harness with a multimeter for short to ground: measure resistance from the suspect output wire(s) to chassis ground. Near 0 Ω indicates short.
- With ignition ON, backprobe the supply pin to confirm battery voltage. Backprobe output pin and operate hazard switch; a healthy circuit will show pulsed voltage when active. If output is held near 0 V (ground) regardless, suspect a short or failed switch/module.
- Isolate wiring by disconnecting connectors progressively (steering column, junction blocks, BCM) to locate the section with the short. Use continuity or voltage-drop tests while isolating.
- Inspect and repair any damaged wiring, pin repairs, or replace corroded connectors. If wiring is intact and short persists, bench-test or replace the hazard switch and/or flasher/body control module as per factory procedure.
- After repair, restore connectors, replace any fuses, clear codes, and verify proper hazard and turn-signal operation. Re-scan to confirm no reoccurrence.
- Advise retest drive/use and re-check for intermittent faults over time if repair was wiring-related.
Likely causes
- Shorted or pinched wire in the steering column harness where the hazard switch wiring passes
- Faulty hazard flasher switch with internal short to ground
- Corroded/loose connector causing a grounded pin at the switch or control module
- Short in wiring near connectors (e.g., behind dash) after recent work or component replacement
Fault status
Status
Hazard flasher switch circuit shorted to ground detected; hazard lamps may be inoperative and related fuses may blow.
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
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Code
B1510
Other
B — Body
Flash To Pass Switch Circuit Short To Ground
Views:
UK: 12
EN: 30
RU: 38
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring contacting chassis ground
- Corroded, bent or damaged connector pins at the hazard switch or BCM/relay module
- Failed hazard flasher switch (internal short)
- Faulty flasher/relay/module (internal short in output stage)
- Aftermarket equipment or repair that spliced into the circuit incorrectly
- Water ingress or corrosion in steering column or switch area
Symptoms
- Hazard lights do not operate or operate intermittently
- Turn signals may be affected or not function correctly
- Blown fuse(s) on hazard/indicator circuit
- Possible battery drain if short is permanent
- Related warning lamp on dash or stored body module faults
- Clicking/flasher noise absent when hazards selected
What to check
- Retrieve freeze-frame data and confirm stored DTC and any related codes with a scan tool
- Visual inspection of hazard switch, connectors, and wiring for damage, corrosion or pinching
- Check relevant fuses and fuse holders for continuity and proper rating
- Inspect for aftermarket taps or recent repairs in the dash/steering column area
- Disconnect hazard switch connector and check if DTC clears or symptom changes (use caution)
- Measure voltage at switch supply and output with a multimeter before and after disconnect
Signal parameters
- Supply voltage at hazard switch supply pin: about battery voltage (12–14.5 V) with ignition ON
- Output/switch pin when activated: pulsed between ~0 V and ~12 V (flashing duty) when functioning
- Output/switch pin when OFF: open/high-impedance (no battery voltage; not shorted to ground)
- Resistance from output pin to chassis ground: Open/very high resistance when circuit is healthy; near 0 Ω indicates a short to ground
- Expected continuity: closed switch to module side only when switch actuated; otherwise no continuity to ground
Diagnostic algorithm
- Record the code and any related codes using a diagnostic scanner. Note vehicle conditions when code set.
- Visually inspect hazard switch, steering column area, instrument panel harness and relevant connectors for damage, corrosion or water ingress.
- Check relevant fuses for continuity and correct amperage. Replace blown fuses only after finding root cause of short.
- With ignition OFF, disconnect the hazard switch connector. Clear the code and then re-check by attempting to operate hazards and scanning for code return.
- If code does not return with switch disconnected, probe the switch wiring harness with a multimeter for short to ground: measure resistance from the suspect output wire(s) to chassis ground. Near 0 Ω indicates short.
- With ignition ON, backprobe the supply pin to confirm battery voltage. Backprobe output pin and operate hazard switch; a healthy circuit will show pulsed voltage when active. If output is held near 0 V (ground) regardless, suspect a short or failed switch/module.
- Isolate wiring by disconnecting connectors progressively (steering column, junction blocks, BCM) to locate the section with the short. Use continuity or voltage-drop tests while isolating.
- Inspect and repair any damaged wiring, pin repairs, or replace corroded connectors. If wiring is intact and short persists, bench-test or replace the hazard switch and/or flasher/body control module as per factory procedure.
- After repair, restore connectors, replace any fuses, clear codes, and verify proper hazard and turn-signal operation. Re-scan to confirm no reoccurrence.
- Advise retest drive/use and re-check for intermittent faults over time if repair was wiring-related.
Likely causes
- Shorted or pinched wire in the steering column harness where the hazard switch wiring passes
- Faulty hazard flasher switch with internal short to ground
- Corroded/loose connector causing a grounded pin at the switch or control module
- Short in wiring near connectors (e.g., behind dash) after recent work or component replacement
Fault status
Status
Hazard flasher switch circuit shorted to ground detected; hazard lamps may be inoperative and related fuses may blow.
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Similar codes
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Was this AI description helpful?
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