Code
B1502
ALFA ROMEO
B — Body
Left turn indicator warning lamp short to ground
Views:
UK: 5
EN: 15
RU: 7
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring with exposed conductor contacting chassis ground
- Corroded or damaged lamp holder or bulb causing internal short
- Faulty or contaminated instrument cluster/indicator lamp assembly
- Poor or loose ground connection at lamp or body control module (BCM)
- Incorrect replacement bulb or aftermarket modification creating low resistance path
- Moisture/water ingress in connector or lamp housing
Symptoms
- Left turn indicator warning lamp not operating or behaving abnormally
- Turn signal may not flash or may flash rapidly on left side
- Instrument cluster warning related to left indicator
- Possible blown fuse if short current is high
- Intermittent function when moving wiring or connector
What to check
- Confirm stored DTC and freeze frame with diagnostic scanner; note if code is current or historic
- Visual inspection of left rear/front turn lamp, socket and wiring for damage, corrosion or moisture
- Inspect connector pins at lamp and BCM for corrosion, bent pins, or pushed-back wires
- Check related fuses and ground points for security and corrosion
- Swap left and right lamp/bulb (if identical) to see if fault follows the lamp
- Wiggle test harness while observing lamp operation or scanner live data to reproduce fault
Signal parameters
- Standby (ignition ON, indicators OFF): open circuit or very high resistance between lamp feed and ground
- Active (left indicator ON): lamp feed should show pulsed voltage ~11–14 V (vehicle battery voltage) at turn-signal flash rate (~0.5–1.5 Hz)
- Shorted condition: low resistance/near 0 Ω between lamp feed and ground or steady near 0 V instead of pulsed battery voltage
- Typical lamp current draw (single incandescent indicator): a few hundred milliamps; significant excess current suggests a short or wrong bulb
Diagnostic algorithm
- Read and record DTC(s) and live data from the body/comfort module and clear codes to see if fault returns.
- Perform a visual inspection of left indicator lamp(s), socket, wiring harness, and nearby chassis for rubbed-through insulation or water ingress.
- Remove bulb and inspect for signs of shorting or incorrect bulb type; measure resistance between bulb contacts and ground with bulb removed.
- With connector disconnected from the lamp, measure voltage at the lamp feed terminal while activating left turn signal: expect pulsed battery voltage. If terminal is low/grounded with connector disconnected, short is upstream toward BCM/wiring.
- Measure resistance between feed terminal and chassis ground with ignition off. Low resistance indicates a short to ground. Isolate sections of wiring (disconnect intermediate connectors) to localize the short.
- Inspect and test ground points for the lamp and BCM; clean and tighten as required.
- If wiring and lamp socket OK, test/replace the lamp assembly or instrument cluster indicator lamp. If fault persists and wiring checks are clear, test BCM output driver for that channel (compare to right-side channel if possible).
- Repair or replace damaged wiring, connectors, lamp socket, or module as indicated. After repairs clear codes and retest all functions, verifying no return of the fault.
Likely causes
- Damaged lamp holder or socket allowing contact between terminals and housing
- Connector corrosion or bent pin creating direct ground path
- Wiring harness rubbed through where it contacts body panels
- Failed turn indicator lamp (shorted filament) or wrong bulb type installed
Fault status
Status
Left turn indicator warning lamp circuit - short to ground detected by vehicle control module.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
B1502
FIAT
B — Body
Left turn indicator warning lamp short to ground
Views:
UK: 5
EN: 15
RU: 6
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring with exposed conductor contacting chassis ground
- Corroded or damaged lamp holder or bulb causing internal short
- Faulty or contaminated instrument cluster/indicator lamp assembly
- Poor or loose ground connection at lamp or body control module (BCM)
- Incorrect replacement bulb or aftermarket modification creating low resistance path
- Moisture/water ingress in connector or lamp housing
Symptoms
- Left turn indicator warning lamp not operating or behaving abnormally
- Turn signal may not flash or may flash rapidly on left side
- Instrument cluster warning related to left indicator
- Possible blown fuse if short current is high
- Intermittent function when moving wiring or connector
What to check
- Confirm stored DTC and freeze frame with diagnostic scanner; note if code is current or historic
- Visual inspection of left rear/front turn lamp, socket and wiring for damage, corrosion or moisture
- Inspect connector pins at lamp and BCM for corrosion, bent pins, or pushed-back wires
- Check related fuses and ground points for security and corrosion
- Swap left and right lamp/bulb (if identical) to see if fault follows the lamp
- Wiggle test harness while observing lamp operation or scanner live data to reproduce fault
Signal parameters
- Standby (ignition ON, indicators OFF): open circuit or very high resistance between lamp feed and ground
- Active (left indicator ON): lamp feed should show pulsed voltage ~11–14 V (vehicle battery voltage) at turn-signal flash rate (~0.5–1.5 Hz)
- Shorted condition: low resistance/near 0 Ω between lamp feed and ground or steady near 0 V instead of pulsed battery voltage
- Typical lamp current draw (single incandescent indicator): a few hundred milliamps; significant excess current suggests a short or wrong bulb
Diagnostic algorithm
- Read and record DTC(s) and live data from the body/comfort module and clear codes to see if fault returns.
- Perform a visual inspection of left indicator lamp(s), socket, wiring harness, and nearby chassis for rubbed-through insulation or water ingress.
- Remove bulb and inspect for signs of shorting or incorrect bulb type; measure resistance between bulb contacts and ground with bulb removed.
- With connector disconnected from the lamp, measure voltage at the lamp feed terminal while activating left turn signal: expect pulsed battery voltage. If terminal is low/grounded with connector disconnected, short is upstream toward BCM/wiring.
- Measure resistance between feed terminal and chassis ground with ignition off. Low resistance indicates a short to ground. Isolate sections of wiring (disconnect intermediate connectors) to localize the short.
- Inspect and test ground points for the lamp and BCM; clean and tighten as required.
- If wiring and lamp socket OK, test/replace the lamp assembly or instrument cluster indicator lamp. If fault persists and wiring checks are clear, test BCM output driver for that channel (compare to right-side channel if possible).
- Repair or replace damaged wiring, connectors, lamp socket, or module as indicated. After repairs clear codes and retest all functions, verifying no return of the fault.
Likely causes
- Damaged lamp holder or socket allowing contact between terminals and housing
- Connector corrosion or bent pin creating direct ground path
- Wiring harness rubbed through where it contacts body panels
- Failed turn indicator lamp (shorted filament) or wrong bulb type installed
Fault status
Status
Left turn indicator warning lamp circuit - short to ground detected by vehicle control module.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
B1502
LAND ROVER
B — Body
Left turn signal bulb - short circuit to ground
Views:
UK: 9
EN: 23
RU: 16
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring with exposed conductor contacting chassis ground
- Corroded or damaged lamp holder or bulb causing internal short
- Faulty or contaminated instrument cluster/indicator lamp assembly
- Poor or loose ground connection at lamp or body control module (BCM)
- Incorrect replacement bulb or aftermarket modification creating low resistance path
- Moisture/water ingress in connector or lamp housing
Symptoms
- Left turn indicator warning lamp not operating or behaving abnormally
- Turn signal may not flash or may flash rapidly on left side
- Instrument cluster warning related to left indicator
- Possible blown fuse if short current is high
- Intermittent function when moving wiring or connector
What to check
- Confirm stored DTC and freeze frame with diagnostic scanner; note if code is current or historic
- Visual inspection of left rear/front turn lamp, socket and wiring for damage, corrosion or moisture
- Inspect connector pins at lamp and BCM for corrosion, bent pins, or pushed-back wires
- Check related fuses and ground points for security and corrosion
- Swap left and right lamp/bulb (if identical) to see if fault follows the lamp
- Wiggle test harness while observing lamp operation or scanner live data to reproduce fault
Signal parameters
- Standby (ignition ON, indicators OFF): open circuit or very high resistance between lamp feed and ground
- Active (left indicator ON): lamp feed should show pulsed voltage ~11–14 V (vehicle battery voltage) at turn-signal flash rate (~0.5–1.5 Hz)
- Shorted condition: low resistance/near 0 Ω between lamp feed and ground or steady near 0 V instead of pulsed battery voltage
- Typical lamp current draw (single incandescent indicator): a few hundred milliamps; significant excess current suggests a short or wrong bulb
Diagnostic algorithm
- Read and record DTC(s) and live data from the body/comfort module and clear codes to see if fault returns.
- Perform a visual inspection of left indicator lamp(s), socket, wiring harness, and nearby chassis for rubbed-through insulation or water ingress.
- Remove bulb and inspect for signs of shorting or incorrect bulb type; measure resistance between bulb contacts and ground with bulb removed.
- With connector disconnected from the lamp, measure voltage at the lamp feed terminal while activating left turn signal: expect pulsed battery voltage. If terminal is low/grounded with connector disconnected, short is upstream toward BCM/wiring.
- Measure resistance between feed terminal and chassis ground with ignition off. Low resistance indicates a short to ground. Isolate sections of wiring (disconnect intermediate connectors) to localize the short.
- Inspect and test ground points for the lamp and BCM; clean and tighten as required.
- If wiring and lamp socket OK, test/replace the lamp assembly or instrument cluster indicator lamp. If fault persists and wiring checks are clear, test BCM output driver for that channel (compare to right-side channel if possible).
- Repair or replace damaged wiring, connectors, lamp socket, or module as indicated. After repairs clear codes and retest all functions, verifying no return of the fault.
Likely causes
- Damaged lamp holder or socket allowing contact between terminals and housing
- Connector corrosion or bent pin creating direct ground path
- Wiring harness rubbed through where it contacts body panels
- Failed turn indicator lamp (shorted filament) or wrong bulb type installed
Fault status
Status
Left turn indicator warning lamp circuit - short to ground detected by vehicle control module.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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Code
B1502
MITSUBISHI
B — Body
RR curtain ABG squib grounding
Views:
UK: 11
EN: 25
RU: 18
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring with exposed conductor contacting chassis ground
- Corroded or damaged lamp holder or bulb causing internal short
- Faulty or contaminated instrument cluster/indicator lamp assembly
- Poor or loose ground connection at lamp or body control module (BCM)
- Incorrect replacement bulb or aftermarket modification creating low resistance path
- Moisture/water ingress in connector or lamp housing
Symptoms
- Left turn indicator warning lamp not operating or behaving abnormally
- Turn signal may not flash or may flash rapidly on left side
- Instrument cluster warning related to left indicator
- Possible blown fuse if short current is high
- Intermittent function when moving wiring or connector
What to check
- Confirm stored DTC and freeze frame with diagnostic scanner; note if code is current or historic
- Visual inspection of left rear/front turn lamp, socket and wiring for damage, corrosion or moisture
- Inspect connector pins at lamp and BCM for corrosion, bent pins, or pushed-back wires
- Check related fuses and ground points for security and corrosion
- Swap left and right lamp/bulb (if identical) to see if fault follows the lamp
- Wiggle test harness while observing lamp operation or scanner live data to reproduce fault
Signal parameters
- Standby (ignition ON, indicators OFF): open circuit or very high resistance between lamp feed and ground
- Active (left indicator ON): lamp feed should show pulsed voltage ~11–14 V (vehicle battery voltage) at turn-signal flash rate (~0.5–1.5 Hz)
- Shorted condition: low resistance/near 0 Ω between lamp feed and ground or steady near 0 V instead of pulsed battery voltage
- Typical lamp current draw (single incandescent indicator): a few hundred milliamps; significant excess current suggests a short or wrong bulb
Diagnostic algorithm
- Read and record DTC(s) and live data from the body/comfort module and clear codes to see if fault returns.
- Perform a visual inspection of left indicator lamp(s), socket, wiring harness, and nearby chassis for rubbed-through insulation or water ingress.
- Remove bulb and inspect for signs of shorting or incorrect bulb type; measure resistance between bulb contacts and ground with bulb removed.
- With connector disconnected from the lamp, measure voltage at the lamp feed terminal while activating left turn signal: expect pulsed battery voltage. If terminal is low/grounded with connector disconnected, short is upstream toward BCM/wiring.
- Measure resistance between feed terminal and chassis ground with ignition off. Low resistance indicates a short to ground. Isolate sections of wiring (disconnect intermediate connectors) to localize the short.
- Inspect and test ground points for the lamp and BCM; clean and tighten as required.
- If wiring and lamp socket OK, test/replace the lamp assembly or instrument cluster indicator lamp. If fault persists and wiring checks are clear, test BCM output driver for that channel (compare to right-side channel if possible).
- Repair or replace damaged wiring, connectors, lamp socket, or module as indicated. After repairs clear codes and retest all functions, verifying no return of the fault.
Likely causes
- Damaged lamp holder or socket allowing contact between terminals and housing
- Connector corrosion or bent pin creating direct ground path
- Wiring harness rubbed through where it contacts body panels
- Failed turn indicator lamp (shorted filament) or wrong bulb type installed
Fault status
Status
Left turn indicator warning lamp circuit - short to ground detected by vehicle control module.
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?
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0
Send to email
Code
B1502
Other
B — Body
Lamp Turn Signal Left Circuit Short To Ground
Views:
UK: 22
EN: 46
RU: 36
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring with exposed conductor contacting chassis ground
- Corroded or damaged lamp holder or bulb causing internal short
- Faulty or contaminated instrument cluster/indicator lamp assembly
- Poor or loose ground connection at lamp or body control module (BCM)
- Incorrect replacement bulb or aftermarket modification creating low resistance path
- Moisture/water ingress in connector or lamp housing
Symptoms
- Left turn indicator warning lamp not operating or behaving abnormally
- Turn signal may not flash or may flash rapidly on left side
- Instrument cluster warning related to left indicator
- Possible blown fuse if short current is high
- Intermittent function when moving wiring or connector
What to check
- Confirm stored DTC and freeze frame with diagnostic scanner; note if code is current or historic
- Visual inspection of left rear/front turn lamp, socket and wiring for damage, corrosion or moisture
- Inspect connector pins at lamp and BCM for corrosion, bent pins, or pushed-back wires
- Check related fuses and ground points for security and corrosion
- Swap left and right lamp/bulb (if identical) to see if fault follows the lamp
- Wiggle test harness while observing lamp operation or scanner live data to reproduce fault
Signal parameters
- Standby (ignition ON, indicators OFF): open circuit or very high resistance between lamp feed and ground
- Active (left indicator ON): lamp feed should show pulsed voltage ~11–14 V (vehicle battery voltage) at turn-signal flash rate (~0.5–1.5 Hz)
- Shorted condition: low resistance/near 0 Ω between lamp feed and ground or steady near 0 V instead of pulsed battery voltage
- Typical lamp current draw (single incandescent indicator): a few hundred milliamps; significant excess current suggests a short or wrong bulb
Diagnostic algorithm
- Read and record DTC(s) and live data from the body/comfort module and clear codes to see if fault returns.
- Perform a visual inspection of left indicator lamp(s), socket, wiring harness, and nearby chassis for rubbed-through insulation or water ingress.
- Remove bulb and inspect for signs of shorting or incorrect bulb type; measure resistance between bulb contacts and ground with bulb removed.
- With connector disconnected from the lamp, measure voltage at the lamp feed terminal while activating left turn signal: expect pulsed battery voltage. If terminal is low/grounded with connector disconnected, short is upstream toward BCM/wiring.
- Measure resistance between feed terminal and chassis ground with ignition off. Low resistance indicates a short to ground. Isolate sections of wiring (disconnect intermediate connectors) to localize the short.
- Inspect and test ground points for the lamp and BCM; clean and tighten as required.
- If wiring and lamp socket OK, test/replace the lamp assembly or instrument cluster indicator lamp. If fault persists and wiring checks are clear, test BCM output driver for that channel (compare to right-side channel if possible).
- Repair or replace damaged wiring, connectors, lamp socket, or module as indicated. After repairs clear codes and retest all functions, verifying no return of the fault.
Likely causes
- Damaged lamp holder or socket allowing contact between terminals and housing
- Connector corrosion or bent pin creating direct ground path
- Wiring harness rubbed through where it contacts body panels
- Failed turn indicator lamp (shorted filament) or wrong bulb type installed
Fault status
Status
Left turn indicator warning lamp circuit - short to ground detected by vehicle control module.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
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Workshop Manual199,00 UAH
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