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
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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
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email