B1C82

Code

LAND ROVER B — Body

Headlight coil system washing machine relay

Brand: LAND ROVER

Type: B — Body

Views: UK: 15 EN: 41 RU: 26

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse for headlight washer circuit
Faulty headlamp washer pump relay (coil)
Open or shorted wiring between relay and washer pump/ECU
Corroded or loose relay/socket/connector pins
Faulty body control module (BCM) or relay driver output
Intermittent wiring damage (chafing, water ingress)

Symptoms

Headlamp washer does not operate when activated
Washer operates intermittently or only after multiple attempts
Related headlamp washer fuse blows repeatedly
Diagnostic trouble code B1C82 stored in body module
Possible warning message or reduced functionality in body systems

What to check

Retrieve freeze frame and full DTC list with compatible diagnostic tool
Visually inspect relay, relay socket and wiring harness for damage or corrosion
Check relevant fuses (headlamp/washer) and fuse holders
Operate headlamp washer while watching relay and listening for relay click
Check connector pins for corrosion, bent pins or water intrusion
Review wiring diagram to identify relay coil supply and ground circuits

Signal parameters

Relay coil supply voltage when washer is requested: ~11–14 V (battery voltage)
Relay coil resistance (typical automotive 12V relay): ~50–200 Ω (vehicle-specific)
Coil current when energized: ~60–250 mA (depends on relay)
Control signal from BCM: switched ground or +12V pulse when washer command is given
No voltage (open) measured at coil when relay not energized

Diagnostic algorithm

Use a diagnostic scanner to confirm B1C82 and note freeze-frame data and occurrence count.
Visually inspect relay, socket and wiring for signs of heat, corrosion, water ingress or physical damage.
Check fuses related to headlamp washer circuit; replace blown fuses only after finding cause.
With ignition on, operate washer while probing relay coil terminals: verify battery voltage present at the feed terminal and switching (ground or +12V) at the control terminal when commanded.
Measure coil resistance with relay removed: compare to expected range from vehicle documentation. If coil open or shorted, replace relay.
If control signal is absent, back-probe control wire at BCM connector and check for driver output when command is given. If no output, verify BCM grounds and supply voltages.
Inspect and continuity-test wiring between relay and pump/BCM for shorts to ground/battery or open circuits; repair damaged wiring/connectors.
If wiring and relay check OK but code persists, substitute a known-good relay and retest.
After repair, clear codes and perform functional test multiple cycles; road or soak test if intermittent condition suspected.
If fault remains and wiring/relay verified, consider module diagnostic for BCM and consult manufacturer service information for module replacement procedures.

Likely causes

Relay coil open or shorted
Corroded connector at relay socket or washer pump
Blown inline fuse or fusible link
Damaged ground or power feed to relay coil
Faulty relay driver in BCM

Fault status

⚠️ Status

Stored fault: Headlamp/headlight washer relay coil circuit malfunction. Possible open circuit, short to battery/ground, or intermittent connection in relay coil or its wiring. Function of headlamp washer may be lost or intermittent.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5 - 1.5 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

413

Browse 413 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 :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email