Code
B1247
LAND ROVER
B — Body
Left rear turn signal indicator
Views:
UK: 3
EN: 5
RU: 7
AI status
Completed
Completed
100%
Causes
- Burnt-out or faulty turn signal bulb (left rear)
- Corroded/damaged bulb socket or connector
- Open or shorted wiring between lamp and control module
- Poor or missing ground at the lamp circuit
- Faulty Body Control Module (BCM) / SAM / lamp driver
- Blown related fuse or poor fuse connection
Symptoms
- Left rear turn signal does not illuminate
- Turn signal indicator on dash may flash faster than normal (hyperflash) or warn
- Interruptions or intermittent function for left rear signal
- Possible warning lamp/message on instrument cluster
- Other lighting circuits may operate normally
What to check
- Scan vehicle with OEM-capable scan tool to read/confirm B1247 and view live lamp status
- Visually inspect left rear bulb for blown filament and inspect socket for corrosion or damage
- Check related fuses and fuse holder connections
- Activate turn signal and verify ~12 V at lamp socket pin with a multimeter
- Check continuity to ground at the lamp socket and measure resistance to chassis
- Wiggle test wiring and connectors while monitoring lamp function for intermittent faults
Signal parameters
- Supply voltage at lamp socket when active: ~11–14 V
- Typical incandescent bulb current: ~0.5–2.0 A (depends on bulb wattage, e.g., 21 W ≈ 1.7 A at 12 V)
- Lamp filament resistance (cold): tens of ohms (depends on bulb wattage), near infinite if open
- Normal flash rate: ~60–120 flashes per minute (varies by vehicle); noticeably faster if a bulb is out
- Continuity: near 0 Ω from socket ground to chassis ground
Diagnostic algorithm
- Connect scan tool, read and record B1247 and any related codes; view live data for left rear lamp output.
- Visually inspect bulb and socket. Replace bulb with known good unit or swap with right rear to confirm bulb condition.
- Inspect connectors, pins and wiring for corrosion, bent pins, burns or water ingress. Repair as needed.
- With turn signal commanded ON, measure voltage at the lamp socket positive terminal and measure continuity to ground. Note intermittent loss of voltage or unexpected short to ground/ignition.
- If no supply voltage at socket but BCM indicates output active, backprobe harness and trace between module and lamp to find open circuit or high resistance.
- Check associated fuses and wiring junctions (including trailer/tow connectors) for shorts or poor connections.
- If wiring and lamp verify good but module output is abnormal, consult wiring diagrams and consider replacing or reprogramming BCM/SAM per manufacturer procedure.
- Clear codes, re-test functionality and verify code does not return.
Likely causes
- Burnt/failed left rear bulb
- Corroded socket or loose connector
- Open ground or broken filament wiring
- Short to chassis or +12V in harness
- Faulty lamp output in BCM (less common)
Fault status
Status
Left rear turn signal circuit fault detected — bulb out/open/short/low or high resistance in left rear indicator circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
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Code
B1247
Other
B — Body
Panel Dim Switch Circuit Open
Views:
UK: 16
EN: 22
RU: 21
AI status
Completed
Completed
100%
Causes
- Burnt-out or faulty turn signal bulb (left rear)
- Corroded/damaged bulb socket or connector
- Open or shorted wiring between lamp and control module
- Poor or missing ground at the lamp circuit
- Faulty Body Control Module (BCM) / SAM / lamp driver
- Blown related fuse or poor fuse connection
Symptoms
- Left rear turn signal does not illuminate
- Turn signal indicator on dash may flash faster than normal (hyperflash) or warn
- Interruptions or intermittent function for left rear signal
- Possible warning lamp/message on instrument cluster
- Other lighting circuits may operate normally
What to check
- Scan vehicle with OEM-capable scan tool to read/confirm B1247 and view live lamp status
- Visually inspect left rear bulb for blown filament and inspect socket for corrosion or damage
- Check related fuses and fuse holder connections
- Activate turn signal and verify ~12 V at lamp socket pin with a multimeter
- Check continuity to ground at the lamp socket and measure resistance to chassis
- Wiggle test wiring and connectors while monitoring lamp function for intermittent faults
Signal parameters
- Supply voltage at lamp socket when active: ~11–14 V
- Typical incandescent bulb current: ~0.5–2.0 A (depends on bulb wattage, e.g., 21 W ≈ 1.7 A at 12 V)
- Lamp filament resistance (cold): tens of ohms (depends on bulb wattage), near infinite if open
- Normal flash rate: ~60–120 flashes per minute (varies by vehicle); noticeably faster if a bulb is out
- Continuity: near 0 Ω from socket ground to chassis ground
Diagnostic algorithm
- Connect scan tool, read and record B1247 and any related codes; view live data for left rear lamp output.
- Visually inspect bulb and socket. Replace bulb with known good unit or swap with right rear to confirm bulb condition.
- Inspect connectors, pins and wiring for corrosion, bent pins, burns or water ingress. Repair as needed.
- With turn signal commanded ON, measure voltage at the lamp socket positive terminal and measure continuity to ground. Note intermittent loss of voltage or unexpected short to ground/ignition.
- If no supply voltage at socket but BCM indicates output active, backprobe harness and trace between module and lamp to find open circuit or high resistance.
- Check associated fuses and wiring junctions (including trailer/tow connectors) for shorts or poor connections.
- If wiring and lamp verify good but module output is abnormal, consult wiring diagrams and consider replacing or reprogramming BCM/SAM per manufacturer procedure.
- Clear codes, re-test functionality and verify code does not return.
Likely causes
- Burnt/failed left rear bulb
- Corroded socket or loose connector
- Open ground or broken filament wiring
- Short to chassis or +12V in harness
- Faulty lamp output in BCM (less common)
Fault status
Status
Left rear turn signal circuit fault detected — bulb out/open/short/low or high resistance in left rear indicator circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
Your experience will help others
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Was this AI description helpful?
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👍 Like
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