Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B1470 — Lamp light entry - circuit failure

B1470 — Lamp light entry - circuit failure

Detailed page for trouble code B1470.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B1470

LAND ROVER B — Body

Lamp light entry - circuit failure

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or fusible link for interior/entry lamps
  • Faulty lamp assembly (bulb or LED module)
  • Open or shorted wiring (chafed harness, pinched wire)
  • Poor or corroded connector or ground
  • Faulty Body Control Module (BCM) or lighting module
  • Water ingress or contamination at lamp or connector

Symptoms

  • Interior dome/map/entry lamps do not illuminate when doors open or with switch
  • Lamps stuck ON or do not respond to entry settings
  • Intermittent lamp operation (works with jiggling harness)
  • Battery drain when vehicle is off
  • Related dash message or warning about interior lamps
  • Other body lighting functions behaving erratically

What to check

  • Read and record all stored DTCs and freeze frame data with a diagnostic scanner
  • Check interior lighting fuse(s) for continuity and correct rating
  • Visual inspection of lamp assemblies, connectors and wiring for corrosion, damage, moisture
  • Operate the lamp/switch while monitoring the circuit to observe behavior
  • Inspect and test door ajar switches and wiring that trigger entry lamps
  • Check for related codes in BCM or gateway modules (CAN communication faults)

Signal parameters

  • Expected battery voltage at lamp feed: ~11–14 V when lamp commanded ON
  • Near 0 V at lamp feed when OFF (unless switched to ground-side control)
  • Ground continuity: near 0 ohms between lamp ground pin and chassis
  • Current draw: incandescent bulbs ~0.1–2 A depending on type; LED modules much lower (tens to hundreds mA)
  • BCM command: digital/PWM drive or switched ground depending on model (verify with service data)
  • CAN/BUS: BCM may report lamp state via body CAN (check for missing messages if communication fault suspected)

Diagnostic algorithm

  1. Connect a capable scan tool. Read and record all DTCs and live data. Note any other related codes.
  2. Attempt to reproduce fault: operate entry/dome lamps, door open/close, and switches while monitoring scanner.
  3. Perform visual inspection of lamps, connectors and harnesses (roof lining, doors, hinge areas) for damage or water ingress.
  4. Check relevant fuses and replace if blown. Retest operation.
  5. Remove lamp assembly and inspect bulbs/LEDs and connectors. Test lamp on a known good 12 V source or swap with a known good lamp.
  6. With connector disconnected, measure feed voltage and ground at the lamp connector during commanded ON/OFF. Compare to expected values.
  7. If supply voltage is present but lamp does not light, measure current draw and check for open filament/LED failure or high-resistance connection.
  8. If no supply or an unexpected voltage is present, trace wiring back toward the BCM: check continuity, shorts to ground or battery, and intermediate connectors.
  9. Inspect and test grounds at body/chassis near lamp circuits. Clean and re-torque ground points as required.
  10. If wiring and lamps test good, test BCM output for proper switching using a scope or DVOM (observe PWM if applicable). Consider module reflash/reprogramming per manufacturer procedures.
  11. Clear codes and verify repair by cycling doors and switches and rechecking for return of DTC.
  12. If BCM is confirmed faulty after exhaustive testing, follow manufacturer procedures for replacement and coding.

Likely causes

  • Disconnected or corroded connector at the dome/map lamp assembly
  • Failed LED module inside the lamp (common on modern Land Rovers)
  • Open ground or high resistance ground at lamp mounting point
  • Short to battery or to ground in harness near hinge or door
  • Blown interior lighting fuse
  • BCM output transistor failure or internal fault in lighting module

Fault status

⚠️ Status
Lamp light entry - circuit failure detected (open/short/communication fault on interior/entry lamp circuit).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

B1471 B1472 B1200 B1310 U1000
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1470

MITSUBISHI B — Body

FL pretensioner squib short

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or fusible link for interior/entry lamps
  • Faulty lamp assembly (bulb or LED module)
  • Open or shorted wiring (chafed harness, pinched wire)
  • Poor or corroded connector or ground
  • Faulty Body Control Module (BCM) or lighting module
  • Water ingress or contamination at lamp or connector

Symptoms

  • Interior dome/map/entry lamps do not illuminate when doors open or with switch
  • Lamps stuck ON or do not respond to entry settings
  • Intermittent lamp operation (works with jiggling harness)
  • Battery drain when vehicle is off
  • Related dash message or warning about interior lamps
  • Other body lighting functions behaving erratically

What to check

  • Read and record all stored DTCs and freeze frame data with a diagnostic scanner
  • Check interior lighting fuse(s) for continuity and correct rating
  • Visual inspection of lamp assemblies, connectors and wiring for corrosion, damage, moisture
  • Operate the lamp/switch while monitoring the circuit to observe behavior
  • Inspect and test door ajar switches and wiring that trigger entry lamps
  • Check for related codes in BCM or gateway modules (CAN communication faults)

Signal parameters

  • Expected battery voltage at lamp feed: ~11–14 V when lamp commanded ON
  • Near 0 V at lamp feed when OFF (unless switched to ground-side control)
  • Ground continuity: near 0 ohms between lamp ground pin and chassis
  • Current draw: incandescent bulbs ~0.1–2 A depending on type; LED modules much lower (tens to hundreds mA)
  • BCM command: digital/PWM drive or switched ground depending on model (verify with service data)
  • CAN/BUS: BCM may report lamp state via body CAN (check for missing messages if communication fault suspected)

Diagnostic algorithm

  1. Connect a capable scan tool. Read and record all DTCs and live data. Note any other related codes.
  2. Attempt to reproduce fault: operate entry/dome lamps, door open/close, and switches while monitoring scanner.
  3. Perform visual inspection of lamps, connectors and harnesses (roof lining, doors, hinge areas) for damage or water ingress.
  4. Check relevant fuses and replace if blown. Retest operation.
  5. Remove lamp assembly and inspect bulbs/LEDs and connectors. Test lamp on a known good 12 V source or swap with a known good lamp.
  6. With connector disconnected, measure feed voltage and ground at the lamp connector during commanded ON/OFF. Compare to expected values.
  7. If supply voltage is present but lamp does not light, measure current draw and check for open filament/LED failure or high-resistance connection.
  8. If no supply or an unexpected voltage is present, trace wiring back toward the BCM: check continuity, shorts to ground or battery, and intermediate connectors.
  9. Inspect and test grounds at body/chassis near lamp circuits. Clean and re-torque ground points as required.
  10. If wiring and lamps test good, test BCM output for proper switching using a scope or DVOM (observe PWM if applicable). Consider module reflash/reprogramming per manufacturer procedures.
  11. Clear codes and verify repair by cycling doors and switches and rechecking for return of DTC.
  12. If BCM is confirmed faulty after exhaustive testing, follow manufacturer procedures for replacement and coding.

Likely causes

  • Disconnected or corroded connector at the dome/map lamp assembly
  • Failed LED module inside the lamp (common on modern Land Rovers)
  • Open ground or high resistance ground at lamp mounting point
  • Short to battery or to ground in harness near hinge or door
  • Blown interior lighting fuse
  • BCM output transistor failure or internal fault in lighting module

Fault status

⚠️ Status
Lamp light entry - circuit failure detected (open/short/communication fault on interior/entry lamp circuit).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

B1471 B1472 B1200 B1310 U1000
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1470

Other B — Body

Lamp Headlamp Input Circuit Failure

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or fusible link for interior/entry lamps
  • Faulty lamp assembly (bulb or LED module)
  • Open or shorted wiring (chafed harness, pinched wire)
  • Poor or corroded connector or ground
  • Faulty Body Control Module (BCM) or lighting module
  • Water ingress or contamination at lamp or connector

Symptoms

  • Interior dome/map/entry lamps do not illuminate when doors open or with switch
  • Lamps stuck ON or do not respond to entry settings
  • Intermittent lamp operation (works with jiggling harness)
  • Battery drain when vehicle is off
  • Related dash message or warning about interior lamps
  • Other body lighting functions behaving erratically

What to check

  • Read and record all stored DTCs and freeze frame data with a diagnostic scanner
  • Check interior lighting fuse(s) for continuity and correct rating
  • Visual inspection of lamp assemblies, connectors and wiring for corrosion, damage, moisture
  • Operate the lamp/switch while monitoring the circuit to observe behavior
  • Inspect and test door ajar switches and wiring that trigger entry lamps
  • Check for related codes in BCM or gateway modules (CAN communication faults)

Signal parameters

  • Expected battery voltage at lamp feed: ~11–14 V when lamp commanded ON
  • Near 0 V at lamp feed when OFF (unless switched to ground-side control)
  • Ground continuity: near 0 ohms between lamp ground pin and chassis
  • Current draw: incandescent bulbs ~0.1–2 A depending on type; LED modules much lower (tens to hundreds mA)
  • BCM command: digital/PWM drive or switched ground depending on model (verify with service data)
  • CAN/BUS: BCM may report lamp state via body CAN (check for missing messages if communication fault suspected)

Diagnostic algorithm

  1. Connect a capable scan tool. Read and record all DTCs and live data. Note any other related codes.
  2. Attempt to reproduce fault: operate entry/dome lamps, door open/close, and switches while monitoring scanner.
  3. Perform visual inspection of lamps, connectors and harnesses (roof lining, doors, hinge areas) for damage or water ingress.
  4. Check relevant fuses and replace if blown. Retest operation.
  5. Remove lamp assembly and inspect bulbs/LEDs and connectors. Test lamp on a known good 12 V source or swap with a known good lamp.
  6. With connector disconnected, measure feed voltage and ground at the lamp connector during commanded ON/OFF. Compare to expected values.
  7. If supply voltage is present but lamp does not light, measure current draw and check for open filament/LED failure or high-resistance connection.
  8. If no supply or an unexpected voltage is present, trace wiring back toward the BCM: check continuity, shorts to ground or battery, and intermediate connectors.
  9. Inspect and test grounds at body/chassis near lamp circuits. Clean and re-torque ground points as required.
  10. If wiring and lamps test good, test BCM output for proper switching using a scope or DVOM (observe PWM if applicable). Consider module reflash/reprogramming per manufacturer procedures.
  11. Clear codes and verify repair by cycling doors and switches and rechecking for return of DTC.
  12. If BCM is confirmed faulty after exhaustive testing, follow manufacturer procedures for replacement and coding.

Likely causes

  • Disconnected or corroded connector at the dome/map lamp assembly
  • Failed LED module inside the lamp (common on modern Land Rovers)
  • Open ground or high resistance ground at lamp mounting point
  • Short to battery or to ground in harness near hinge or door
  • Blown interior lighting fuse
  • BCM output transistor failure or internal fault in lighting module

Fault status

⚠️ Status
Lamp light entry - circuit failure detected (open/short/communication fault on interior/entry lamp circuit).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

B1471 B1472 B1200 B1310 U1000
7,978

The library contains 7,978 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

ALFA ROMEO
89
AUDI
1,160
BMW
479
CHEVROLET
296
DAEWOO
75
FIAT
26
GENESIS
207
HUMMER
138
HYUNDAI
371
ISUZU
86
LAND ROVER
320
LEXUS
280
LINCOLN
166
MERCEDES-BENZ
856
MERCURY
296
MITSUBISHI
406
PORSCHE
136
TESLA
58
TOYOTA
2,042
TRIUMPH
131
VOLKSWAGEN
139
VOLVO
221
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .