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Home / DTC / B1471 — Headlight - open circuit / short to ground Left rear bank switch package battery economy - short circuit to the battery

B1471 — Headlight - open circuit / short to ground Left rear bank switch package battery economy - short circuit to the battery

Detailed page for trouble code B1471.

34,405codes
59brands
11,914generic
22,491specific
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Code

B1471

LAND ROVER B — Body

Headlight - open circuit / short to ground Left rear bank switch package battery economy - short circuit to the battery

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

Causes

  • Damaged or chafed wiring in the left headlight circuit
  • Corroded or poorly seated connector at the headlamp or switch pack
  • Failed headlamp bulb (open filament) or LED driver/module
  • Short to ground in the harness (pin contact to chassis)
  • Short to battery/constant power in the switch package or harness
  • Faulty body control module (BCM) or lighting module

Symptoms

  • Left headlight inoperative or intermittent
  • Left headlight stuck on or uncontrolled (may cause battery drain)
  • Related dash warning/message for lighting or battery economy
  • Blown fuse(s) or repeated fuse failures for lighting circuit
  • Reduced lighting operation (dim or flickering)
  • Stored and reappearing B1471 or related body module codes

What to check

  • Read freeze-frame and full DTC list with a compatible scan tool; note when code sets (key on, engine on, while driving).
  • Visually inspect left headlamp, connectors, and harness for damage, corrosion, or moisture.
  • Check fuses and relays for the lighting and battery economy circuits.
  • Operate headlight while wiggling harness and connectors to reproduce fault.
  • Measure voltage at headlamp connector (connector disconnected and pinned out) with headlight demand on/off.
  • Check continuity from headlamp connector ground to chassis and to BCM control pin.

Signal parameters

  • Supply voltage at headlamp connector (lamp ON): ~11–14.5 V (vehicle battery voltage)
  • Supply voltage at headlamp connector (lamp OFF): ~0 V on switched feed or battery voltage on constant feed depending on design
  • Ground continuity to chassis: low resistance (< 1 Ω) expected from connector ground terminal
  • Bulb/LED module resistance: incandescent low-beam halogen typically a few ohms; open = OL (infinite), short ≈ 0 Ω
  • Switch/module command signal (scan tool): ON/OFF state visible; expected logical state change when switching lights

Diagnostic algorithm

  1. Read and record DTC(s) and freeze-frame data. Note conditions when fault occurred.
  2. Visually inspect left headlamp assembly, connector, and harness for damage, corrosion, or water ingress.
  3. Check fuses/relays for the lighting and battery economy circuits; replace if blown and note if it blows again.
  4. With ignition ON and headlight command active, measure voltage at the headlamp power pin and ground pin at the connector (back-probe or pinned connector).
  5. If power is present and lamp does not illuminate, disconnect headlamp and bench-test the lamp/LED module or substitute a known-good lamp.
  6. If no power at connector, trace power and control back toward the switch pack/BCM. Check connector pins for battery voltage (short to battery) or unexpected continuity to ground (short to ground).
  7. Perform resistance/continuity checks between headlamp connector and BCM/switch pack pins. Repair any opens or high resistance.
  8. If intermittent, wiggle test harness along routing and at common stress points (hinges, mounts).
  9. Use an ammeter or current tracer if there is a suspected short-to-battery to locate high current draw path; isolate sections of harness to localize.
  10. Replace damaged wiring, connectors, lamp, or faulty switch/module as indicated. Re-clear DTCs and verify repair by cycling lights and road test as needed.
  11. If harness and components test OK, suspect BCM or lighting control module; verify power/ground and replace only after confirming control outputs are faulty.

Likely causes

  • Connector corrosion or pushed-back terminal at left headlamp connector
  • Broken wire at a harness flex point (hood hinge, bumper, rear bank area)
  • Failed headlamp unit (internal short or open)
  • Switch pack (battery economy module) internal short to battery
  • BCM/light control module driver fault

Fault status

⚠️ Status
Left headlight circuit: open or short to ground detected, or short to battery in left rear bank switch/battery economy pack. Electrical fault present; lamp operation may be lost or uncontrolled. Repair wiring/connectors, lamp, or module as required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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B1470 B1472 B1480 B1410 B1640
320

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LAND ROVER

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Code

B1471

MITSUBISHI B — Body

FL pretensioner squib open

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

Causes

  • Damaged or chafed wiring in the left headlight circuit
  • Corroded or poorly seated connector at the headlamp or switch pack
  • Failed headlamp bulb (open filament) or LED driver/module
  • Short to ground in the harness (pin contact to chassis)
  • Short to battery/constant power in the switch package or harness
  • Faulty body control module (BCM) or lighting module

Symptoms

  • Left headlight inoperative or intermittent
  • Left headlight stuck on or uncontrolled (may cause battery drain)
  • Related dash warning/message for lighting or battery economy
  • Blown fuse(s) or repeated fuse failures for lighting circuit
  • Reduced lighting operation (dim or flickering)
  • Stored and reappearing B1471 or related body module codes

What to check

  • Read freeze-frame and full DTC list with a compatible scan tool; note when code sets (key on, engine on, while driving).
  • Visually inspect left headlamp, connectors, and harness for damage, corrosion, or moisture.
  • Check fuses and relays for the lighting and battery economy circuits.
  • Operate headlight while wiggling harness and connectors to reproduce fault.
  • Measure voltage at headlamp connector (connector disconnected and pinned out) with headlight demand on/off.
  • Check continuity from headlamp connector ground to chassis and to BCM control pin.

Signal parameters

  • Supply voltage at headlamp connector (lamp ON): ~11–14.5 V (vehicle battery voltage)
  • Supply voltage at headlamp connector (lamp OFF): ~0 V on switched feed or battery voltage on constant feed depending on design
  • Ground continuity to chassis: low resistance (< 1 Ω) expected from connector ground terminal
  • Bulb/LED module resistance: incandescent low-beam halogen typically a few ohms; open = OL (infinite), short ≈ 0 Ω
  • Switch/module command signal (scan tool): ON/OFF state visible; expected logical state change when switching lights

Diagnostic algorithm

  1. Read and record DTC(s) and freeze-frame data. Note conditions when fault occurred.
  2. Visually inspect left headlamp assembly, connector, and harness for damage, corrosion, or water ingress.
  3. Check fuses/relays for the lighting and battery economy circuits; replace if blown and note if it blows again.
  4. With ignition ON and headlight command active, measure voltage at the headlamp power pin and ground pin at the connector (back-probe or pinned connector).
  5. If power is present and lamp does not illuminate, disconnect headlamp and bench-test the lamp/LED module or substitute a known-good lamp.
  6. If no power at connector, trace power and control back toward the switch pack/BCM. Check connector pins for battery voltage (short to battery) or unexpected continuity to ground (short to ground).
  7. Perform resistance/continuity checks between headlamp connector and BCM/switch pack pins. Repair any opens or high resistance.
  8. If intermittent, wiggle test harness along routing and at common stress points (hinges, mounts).
  9. Use an ammeter or current tracer if there is a suspected short-to-battery to locate high current draw path; isolate sections of harness to localize.
  10. Replace damaged wiring, connectors, lamp, or faulty switch/module as indicated. Re-clear DTCs and verify repair by cycling lights and road test as needed.
  11. If harness and components test OK, suspect BCM or lighting control module; verify power/ground and replace only after confirming control outputs are faulty.

Likely causes

  • Connector corrosion or pushed-back terminal at left headlamp connector
  • Broken wire at a harness flex point (hood hinge, bumper, rear bank area)
  • Failed headlamp unit (internal short or open)
  • Switch pack (battery economy module) internal short to battery
  • BCM/light control module driver fault

Fault status

⚠️ Status
Left headlight circuit: open or short to ground detected, or short to battery in left rear bank switch/battery economy pack. Electrical fault present; lamp operation may be lost or uncontrolled. Repair wiring/connectors, lamp, or module as required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1470 B1472 B1480 B1410 B1640
406

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

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

B1471

Other B — Body

Lamp Headlamp Input Circuit Open

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

Causes

  • Damaged or chafed wiring in the left headlight circuit
  • Corroded or poorly seated connector at the headlamp or switch pack
  • Failed headlamp bulb (open filament) or LED driver/module
  • Short to ground in the harness (pin contact to chassis)
  • Short to battery/constant power in the switch package or harness
  • Faulty body control module (BCM) or lighting module

Symptoms

  • Left headlight inoperative or intermittent
  • Left headlight stuck on or uncontrolled (may cause battery drain)
  • Related dash warning/message for lighting or battery economy
  • Blown fuse(s) or repeated fuse failures for lighting circuit
  • Reduced lighting operation (dim or flickering)
  • Stored and reappearing B1471 or related body module codes

What to check

  • Read freeze-frame and full DTC list with a compatible scan tool; note when code sets (key on, engine on, while driving).
  • Visually inspect left headlamp, connectors, and harness for damage, corrosion, or moisture.
  • Check fuses and relays for the lighting and battery economy circuits.
  • Operate headlight while wiggling harness and connectors to reproduce fault.
  • Measure voltage at headlamp connector (connector disconnected and pinned out) with headlight demand on/off.
  • Check continuity from headlamp connector ground to chassis and to BCM control pin.

Signal parameters

  • Supply voltage at headlamp connector (lamp ON): ~11–14.5 V (vehicle battery voltage)
  • Supply voltage at headlamp connector (lamp OFF): ~0 V on switched feed or battery voltage on constant feed depending on design
  • Ground continuity to chassis: low resistance (< 1 Ω) expected from connector ground terminal
  • Bulb/LED module resistance: incandescent low-beam halogen typically a few ohms; open = OL (infinite), short ≈ 0 Ω
  • Switch/module command signal (scan tool): ON/OFF state visible; expected logical state change when switching lights

Diagnostic algorithm

  1. Read and record DTC(s) and freeze-frame data. Note conditions when fault occurred.
  2. Visually inspect left headlamp assembly, connector, and harness for damage, corrosion, or water ingress.
  3. Check fuses/relays for the lighting and battery economy circuits; replace if blown and note if it blows again.
  4. With ignition ON and headlight command active, measure voltage at the headlamp power pin and ground pin at the connector (back-probe or pinned connector).
  5. If power is present and lamp does not illuminate, disconnect headlamp and bench-test the lamp/LED module or substitute a known-good lamp.
  6. If no power at connector, trace power and control back toward the switch pack/BCM. Check connector pins for battery voltage (short to battery) or unexpected continuity to ground (short to ground).
  7. Perform resistance/continuity checks between headlamp connector and BCM/switch pack pins. Repair any opens or high resistance.
  8. If intermittent, wiggle test harness along routing and at common stress points (hinges, mounts).
  9. Use an ammeter or current tracer if there is a suspected short-to-battery to locate high current draw path; isolate sections of harness to localize.
  10. Replace damaged wiring, connectors, lamp, or faulty switch/module as indicated. Re-clear DTCs and verify repair by cycling lights and road test as needed.
  11. If harness and components test OK, suspect BCM or lighting control module; verify power/ground and replace only after confirming control outputs are faulty.

Likely causes

  • Connector corrosion or pushed-back terminal at left headlamp connector
  • Broken wire at a harness flex point (hood hinge, bumper, rear bank area)
  • Failed headlamp unit (internal short or open)
  • Switch pack (battery economy module) internal short to battery
  • BCM/light control module driver fault

Fault status

⚠️ Status
Left headlight circuit: open or short to ground detected, or short to battery in left rear bank switch/battery economy pack. Electrical fault present; lamp operation may be lost or uncontrolled. Repair wiring/connectors, lamp, or module as required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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