Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B2249 — Headlight relay coil - short circuit to battery

B2249 — Headlight relay coil - short circuit to battery

Detailed page for trouble code B2249.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B2249

LAND ROVER B — Body

Headlight relay coil - short circuit to battery

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

Causes

  • Internal short in the headlight relay coil
  • Shorted wiring or chafed insulation contacting constant battery feed
  • Damaged or corroded relay socket/connector causing contact to battery
  • Aftermarket accessory or recent repair created an unintended battery feed to the coil circuit
  • Faulty Body Control Module (BCM) or headlamp control module with internal short

Symptoms

  • Headlights may be stuck ON or not functioning correctly
  • Blown fuse(s) for headlamp circuits or relay feed
  • Illuminated dash warning or lamp failure message
  • Battery drain or parasitic draw when vehicle is off
  • Intermittent headlamp operation or erratic behavior

What to check

  • Inspect relevant fuses for the headlight/relay feed and replace if blown
  • Visually inspect the headlight relay, socket and wiring harness for heat damage, melted insulation or corrosion
  • Check for aftermarket accessories tapped into headlight power or battery feed near relay
  • Measure voltage at the relay socket terminals with connector disconnected
  • Scan for additional DTCs (BCM/lighting module) and view freeze-frame/live data

Signal parameters

  • Expected relay coil voltage: ~11–14 V when battery/ignition supply present
  • Nominal coil resistance (typical automotive relay): ~50–200 ohms (consult vehicle spec)
  • Normal coil current: roughly 60–240 mA (I = V/R) under nominal conditions
  • A direct short to battery will show near 0 ohms (near-continuity) between coil feed and battery positive
  • With ignition off there should be no battery voltage present on the coil control circuit unless designed as retained feed

Diagnostic algorithm

  1. Read and record all stored codes and freeze-frame data. Note any related lighting or BCM codes.
  2. Visually inspect the relay, socket and wiring for damage, melted plastic, corrosion or signs of overheating.
  3. With ignition off, disconnect the headlight relay from its socket. Inspect relay pins for damage or bridging.
  4. Using a DVOM, measure resistance between the relay coil pins on the relay itself (if available) and compare to spec. Very low resistance indicates internal short.
  5. With relay removed, measure voltage between the relay coil control terminal in the harness and chassis ground with ignition off and on as appropriate. Presence of constant battery when it should be switched indicates shorted feed.
  6. Check for continuity between the coil feed and battery positive. High continuity (near 0 ohms) suggests a short; isolate sections of wiring by disconnecting connectors to localize.
  7. Wiggle-test and probe the harness while observing for intermittent changes in voltage or continuity to find chafe points or intermittent shorts.
  8. If harness and connector appear good, inspect/bench-test replacement relay in the circuit. If replacement relay is okay and short persists, suspect BCM/lighting module output stage — verify by measuring module pin behavior and consult wiring diagram.
  9. Repair or replace damaged wiring, connector or relay. If BCM/module shows internal short, refer to manufacturer repair procedure for module replacement or reprogramming.
  10. Clear codes, perform functional test of headlight operation, and road test to confirm fault does not return. Re-scan for any new DTCs.

Likely causes

  • Failed headlight relay (coil shorted internally)
  • Pinched or rubbed wiring harness where coil feed touches battery feed or chassis
  • Connector bent pins or melted housing bridging battery and coil terminals
  • Incorrectly installed aftermarket lighting or battery auxiliary circuit
  • Water ingress/corrosion at relay connector or BCM output stage

Fault status

⚠️ Status
Headlight relay coil circuit short to battery detected — possible relay, wiring or module fault. Inspect relay, connector and wiring for short or damage before replacing control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B2248 B2250 B2299 B1240
320

Browse 320 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 :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .