B1424

Code

LAND ROVER B — Body

Right rear door window motor circuit - circuit short for the battery

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 41 RU: 26

AI status

Completed

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Completed 100%

Page language: EN

Causes

Wiring shorted to constant battery positive (chafed wire, pinched harness at door hinge)
Corroded or water-damaged connector allowing battery feed to leak into control circuit
Faulty right rear window motor with internal short
Faulty door/window switch stuck or shorted to battery feed
Faulty Body Control Module (BCM) or window motor driver output shorted internally
Aftermarket accessory or previous repair incorrectly wired to battery feed

Symptoms

Right rear window operates intermittently or without driver input
Window inoperative and DTC B1424 stored
Blown fuse for power windows or related circuit
Unusual battery drain or parasitic draw
Burnt smell or heat at connector/harness area in severe shorts

What to check

Read all stored DTCs and freeze/frame data with a scan tool; note any related body or network codes
Visually inspect right rear door harness and connector for corrosion, damage or signs of overheating
With ignition off, probe the motor/switch connector for unintended battery voltage
Check fuse(s) and relays for the power window circuit and verify correct rating
Backprobe BCM/window module output pin with wiring diagram to confirm expected voltages
Wiggle-test harness at door hinge while observing voltage/operation to reproduce fault

Signal parameters

Nominal battery voltage when operating: ~12.0–14.5 V
Expected voltage on motor control line with ignition/accessory OFF: ~0 V (no battery feed)
If short to battery present: control line shows ~12 V with switch off
Typical window motor coil resistance: low single-digit ohms (often 1–10 Ω) — check service data for exact value
Typical stall/run current: several amps to tens of amps; excessive current or overheating suggests internal motor short

Diagnostic algorithm

Verify the code: connect a diagnostic scanner, record B1424 and any related codes, then clear and re-scan to confirm persistent fault.
Reproduce/observe: attempt to operate the right rear window while watching behavior and monitoring for blown fuses or unexpected voltage on the circuit.
Isolate the motor: with ignition off, disconnect the right rear window motor connector. Check the harness side for battery voltage on pins that should be inactive. Presence of battery voltage with motor disconnected indicates a short in wiring, switch or module.
Inspect harness/connectors: carefully inspect and flex the harness at the door hinge and along the door for chafe points, broken insulation, or corrosion. Repair any damaged sections (replace/repair wiring with proper splices, heat shrink, loom).
Test the motor and switch: bench-test the motor by applying battery power directly (observe current draw and smooth operation). Test the door switch for correct switching action and no unintended feed from battery.
Trace upstream: using the vehicle wiring diagram, identify feed and control circuits. Backprobe the BCM/window driver output and switch feed under operation to see where the battery positive is present incorrectly.
Check for aftermarket wiring: inspect for nonfactory taps or accessories that may have been tied into the window circuit and remove/correct as needed.
Repair and verify: repair or replace the faulty component (wire, connector, motor, switch, or BCM as required). Reassemble, clear codes, and perform full function test including repeated window operation and hinge-wiggle test to ensure fault does not return.
If BCM/module replacement is required: confirm wiring and loads are correct before replacing the module; program/configure per manufacturer procedure if replacement is performed.

Likely causes

Chafed/pinched wiring in door hinge area shorting to battery positive
Corroded/mis-seated right rear door connector allowing power leakage
Failed window motor with internal short to battery
Window switch shorted to battery feed
BCM/window driver module fault (less common)

Fault status

⚠️ Status

Right rear door window motor circuit — short to battery (positive feed present where circuit should be inactive).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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B1424 — Right rear door window motor circuit - circuit short for the battery