B13DB

Code

LAND ROVER B — Body

Left reverse light

Brand: LAND ROVER

Type: B — Body

Views: UK: 22 EN: 38 RU: 34

AI status

Completed

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Page language: EN

Causes

Burnt or failed reverse bulb (left)
Blown fuse or fusible link for rear lighting circuit
Poor or corroded connector at the lamp or harness
Open or damaged wiring (broken conductor or pinched harness)
Short to ground or short to battery in the lamp circuit
Bad ground/earth at lamp housing or chassis return

Symptoms

Left reverse light does not illuminate when reverse gear selected
Intermittent or flickering left reverse lamp
Only right reverse light works
Related dash warning or lamp fault message
Associated DTCs for other rear lamps or BCM lighting outputs

What to check

Visual inspection of left rear lamp: bulb condition, socket, lens and housing for water/corrosion
Check relevant fuses and fusible links for continuity
Scan vehicle and read BCM/body module for stored codes and live data
Swap left bulb with right to confirm whether bulb is the issue
Inspect wiring and connector for damage, corrosion, bent pins or poor seating
Measure voltage at lamp socket with ignition on and transmission in reverse

Signal parameters

Expected supply voltage at lamp feed when reverse engaged: ~11–14 V (vehicle battery voltage)
Expected near 0 V on feed when reverse not selected (depending on circuit design)
Bulb filament resistance: low ohms (varies by bulb type; normally a few ohms for a typical rear lamp filament)
Continuity between lamp ground terminal and chassis ground: low resistance (near 0 Ω)
No excessive current draw when correct bulb fitted (large draw indicates short or incorrect lamp)

Diagnostic algorithm

Verify symptom: confirm left reverse lamp inoperative with transmission in reverse and engine/ignition state as required.
Check fuses: inspect and test the fuse(s) for rear/reverse lamp circuit; replace if blown and retest.
Inspect bulb and socket: remove left bulb, inspect filament and contacts, check for corrosion or water ingress; swap bulb with right side to test.
Measure voltage: with helper selecting reverse, back-probe the lamp feed pin at the socket and measure voltage to ground. If ~12 V present, suspect bulb/socket/ground. If no voltage, continue to wiring/BCM checks.
Check ground: measure continuity between lamp ground terminal and chassis; repair any high-resistance ground.
Inspect wiring: visually follow harness for chafing, connector damage or corrosion; repair or replace damaged sections. Use continuity test between lamp socket and BCM/fuse.
Check for short: if fuse blows when reverse selected, isolate sections to locate short to ground; use an ammeter or fused jumper for safe testing.
Module check: using a diagnostic scanner, monitor BCM output for left reverse lamp while commanding reverse lamp on; if BCM reports output but no voltage at socket, suspect wiring; if BCM shows low/no output and wiring is good, consider BCM/driver fault or software update.
Repair and verify: replace defective bulb, repair wiring/connectors or replace socket as required, clear codes, retest multiple cycles and road-test to confirm fix.
If BCM suspected after wiring proven good, follow manufacturer procedure for BCM replacement/configuration and confirm with diagnostic tool.

Likely causes

Failed bulb or poor bulb contact
Connector corrosion or loose terminal at left rear lamp
Open circuit in the left reverse lamp feed or ground
Blown fuse protecting the rear lamp circuit
Intermittent wiring fault where harness flexes
BCM output driver fault (less common)

Fault status

⚠️ Status

Left reverse lamp circuit fault detected — abnormal condition (open/short/low output/intermittent) on left reverse light feed reported by control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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Manual library for LAND ROVER

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Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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