B13D7

Code

LAND ROVER B — Body

Lighter cigar

Brand: LAND ROVER

Type: B — Body

Views: UK: 23 EN: 36 RU: 24

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown or corroded fuse for the accessory circuit
Damaged or loose cigarette lighter / 12V socket
Wiring short to ground or open circuit in socket feed or ground
Poor or corroded ground connection
Faulty accessory (phone charger, inverter, etc.) drawing excessive current
Body control module (BCM) or relay output fault controlling the socket

Symptoms

No power at the cigar lighter / 12V socket
Intermittent power or sockets working only intermittently
Fuse repeatedly blows when an accessory is plugged in
Accessories won’t operate or drop in/out under load
Visible heat damage, melting or burning smell at socket area
Possible related body electrical warnings if BCM monitors the circuit

What to check

Visually inspect the socket for melted plastic, foreign objects, corrosion or debris
Check the accessory circuit fuse(s) and replace with correct rating if blown
Inspect wiring harness and connector for chafing, damage, corrosion or loose pins
Measure voltage at the socket terminal with a digital multimeter (battery referenced) with accessory unplugged and with known-good accessory connected
Check continuity and resistance between socket ground and chassis ground
Look for aftermarket devices spliced into the feed; remove to isolate fault

Signal parameters

Battery voltage (nominal 12–14.5 V with engine running)
Socket output voltage (should be near battery voltage with no load)
Fuse feed voltage (voltage upstream and downstream of fuse)
Resistance/continuity between socket ground and chassis (should be very low,
Load current drawn by accessory (compare to fuse rating)
Voltage drop across connector/wire under load (should be minimal, typically

Diagnostic algorithm

Safety: follow workshop procedures; remove high-current accessories and wear eye protection when working on electrical systems.
Step 1 — Verify symptom: attempt to operate a known-good accessory in the socket; note intermittent behaviour or fuse blow.
Step 2 — Check fuse: inspect and test the accessory circuit fuse(s); replace blown fuse with correct rating. If fuse blows again, do not repeatedly replace without isolating circuit.
Step 3 — Inspect socket: visually and physically inspect socket for foreign objects, melted plastic, carbonization or loose contacts; clean or replace socket if contaminated or damaged.
Step 4 — Measure voltages: with a DMM measure battery voltage and voltage at the socket feed pin and socket body/ground. No feed voltage points toward upstream fuse/relay/BCM; no ground points to ground connection issue.
Step 5 — Load/current test: measure current draw when a known-good accessory is connected. Excessive current indicates a short or faulty accessory/shorted wiring.
Step 6 — Wiring check: inspect wiring from socket to fuse/relay/BCM for chafing, pinched sections or corrosion. Perform continuity and resistance checks; repair any damaged wiring or connectors.
Step 7 — Isolate accessory/aftermarket parts: disconnect any aftermarket devices or accessories from the circuit and retest.
Step 8 — BCM/relay check: if wiring and socket are good and fuse still blows or there is no control/feedback from BCM, consult wiring diagrams and test relay/BCM outputs. Replace or reprogram BCM only after confirming wiring and component faults.
Step 9 — Confirm repair: after repair or replacement, verify socket operation under load and ensure fuse does not blow. Clear any related fault codes and confirm they do not return.

Likely causes

Blown fuse protecting the cigar lighter circuit
Damaged or contaminated socket contacts preventing power transfer
Wiring short or open between fuse/relay/BCM and socket
Loose or corroded ground at the socket or chassis

Fault status

⚠️ Status

Cigar lighter (12V accessory) circuit fault — no power, short/overcurrent, or wiring/connector fault detected.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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