Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B2647 — Door Lock Actuator Circuit Open

B2647 — Door Lock Actuator Circuit Open

Detailed page for trouble code B2647.

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

B2647

HUMMER B — Body

Door Lock Actuator Circuit Open

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

Causes

  • Broken or disconnected wiring (open circuit) between BCM/door module and door lock actuator
  • Corroded or loose connector pins at actuator or module
  • Faulty door lock actuator (open internal winding)
  • Damaged wiring harness through door jamb (pinched, chafed, broken)
  • Faulty BCM/door module output driver (internal open)
  • Aftermarket alarm/remote lock installation interference

Symptoms

  • Affected door will not lock or unlock with switch/remote
  • No audible actuator noise from the door when locking/unlocking
  • Intermittent lock operation or only works from one control (e.g., key fob but not switch)
  • Other doors operate normally (isolating to one door)
  • Possible blown fuse if short/failure accompanied prior

What to check

  • Verify correct DTC for specific door (left/right, front/rear) in scan tool data
  • Inspect door harness along door jamb for visible damage, pinched wires or corrosion
  • Visually inspect actuator connector and pins for corrosion, bent pins, or pushed-out terminals
  • Use a DMM to check for continuity between module output pin and actuator connector pin with doors in normal position
  • Check actuator coil resistance at the connector with connector disconnected (compare to specification)
  • Command lock/unlock while probing to observe output voltage/polarity at module and at actuator

Signal parameters

  • No continuity (OL/infinite ohms) measured across actuator terminals indicates open circuit
  • Actuator coil resistance typically in the range of ~5–50 ohms (vehicle-specific — consult spec)
  • When commanded, module output typically supplies battery voltage (~12 V) to one pin and ground on the other; polarity reverses for lock vs unlock on motor-style actuators
  • If BCM output driver is open, you will measure no voltage change at the module output when commanding lock/unlock
  • When measuring at actuator connector while commanding, expected transient pulses or steady battery-voltage drive depending on design

Diagnostic algorithm

  1. Retrieve freeze frame and confirm DTC B2647 details and which door is affected. Note any additional codes.
  2. Visually inspect the actuator harness and connectors at the affected door and door jamb for damage, corrosion, or disconnected connectors.
  3. With door closed, disconnect actuator connector. Measure actuator coil resistance across the actuator terminals. If resistance = infinite, actuator likely open — replace actuator.
  4. With connector disconnected, perform continuity check between BCM/door module output pin and actuator connector pin. If open, isolate and repair the wire (inspect through door jamb).
  5. Reconnect actuator. Command lock/unlock while backprobing module output and actuator connector. Verify voltage/polarity changes at the module and at the actuator. If module output shows no activity but harness is good, suspect module driver fault.
  6. Wiggle test wiring through door jamb while commanding locks to reproduce intermittent opens; repair chafed or broken sections and secure harness.
  7. If wiring and actuator test good but no output from module, verify grounds and battery power to BCM, then consider module replacement or further module bench testing per manufacturer procedures.
  8. Clear codes and perform functional test after repairs. Re-scan to ensure DTC does not return and that locks operate correctly.

Likely causes

  • Open or broken wire in the door jamb (most common on frequently opened doors)
  • Connector corrosion or poor pin contact at the actuator plug
  • Defective door lock actuator motor/coils presenting infinite resistance
  • Module driver failure if wiring and actuator check OK

Fault status

⚠️ Status
Stored DTC B2647 — Door Lock Actuator Circuit Open. Control module detected an open circuit on the door lock actuator output.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

B2646 B2648 B2620 B2680 B2700
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B2647

LAND ROVER B — Body

Passenger occupant detection sensor circuit malfunction

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

Causes

  • Broken or disconnected wiring (open circuit) between BCM/door module and door lock actuator
  • Corroded or loose connector pins at actuator or module
  • Faulty door lock actuator (open internal winding)
  • Damaged wiring harness through door jamb (pinched, chafed, broken)
  • Faulty BCM/door module output driver (internal open)
  • Aftermarket alarm/remote lock installation interference

Symptoms

  • Affected door will not lock or unlock with switch/remote
  • No audible actuator noise from the door when locking/unlocking
  • Intermittent lock operation or only works from one control (e.g., key fob but not switch)
  • Other doors operate normally (isolating to one door)
  • Possible blown fuse if short/failure accompanied prior

What to check

  • Verify correct DTC for specific door (left/right, front/rear) in scan tool data
  • Inspect door harness along door jamb for visible damage, pinched wires or corrosion
  • Visually inspect actuator connector and pins for corrosion, bent pins, or pushed-out terminals
  • Use a DMM to check for continuity between module output pin and actuator connector pin with doors in normal position
  • Check actuator coil resistance at the connector with connector disconnected (compare to specification)
  • Command lock/unlock while probing to observe output voltage/polarity at module and at actuator

Signal parameters

  • No continuity (OL/infinite ohms) measured across actuator terminals indicates open circuit
  • Actuator coil resistance typically in the range of ~5–50 ohms (vehicle-specific — consult spec)
  • When commanded, module output typically supplies battery voltage (~12 V) to one pin and ground on the other; polarity reverses for lock vs unlock on motor-style actuators
  • If BCM output driver is open, you will measure no voltage change at the module output when commanding lock/unlock
  • When measuring at actuator connector while commanding, expected transient pulses or steady battery-voltage drive depending on design

Diagnostic algorithm

  1. Retrieve freeze frame and confirm DTC B2647 details and which door is affected. Note any additional codes.
  2. Visually inspect the actuator harness and connectors at the affected door and door jamb for damage, corrosion, or disconnected connectors.
  3. With door closed, disconnect actuator connector. Measure actuator coil resistance across the actuator terminals. If resistance = infinite, actuator likely open — replace actuator.
  4. With connector disconnected, perform continuity check between BCM/door module output pin and actuator connector pin. If open, isolate and repair the wire (inspect through door jamb).
  5. Reconnect actuator. Command lock/unlock while backprobing module output and actuator connector. Verify voltage/polarity changes at the module and at the actuator. If module output shows no activity but harness is good, suspect module driver fault.
  6. Wiggle test wiring through door jamb while commanding locks to reproduce intermittent opens; repair chafed or broken sections and secure harness.
  7. If wiring and actuator test good but no output from module, verify grounds and battery power to BCM, then consider module replacement or further module bench testing per manufacturer procedures.
  8. Clear codes and perform functional test after repairs. Re-scan to ensure DTC does not return and that locks operate correctly.

Likely causes

  • Open or broken wire in the door jamb (most common on frequently opened doors)
  • Connector corrosion or poor pin contact at the actuator plug
  • Defective door lock actuator motor/coils presenting infinite resistance
  • Module driver failure if wiring and actuator check OK

Fault status

⚠️ Status
Stored DTC B2647 — Door Lock Actuator Circuit Open. Control module detected an open circuit on the door lock actuator output.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

B2646 B2648 B2620 B2680 B2700
269

Browse 269 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 .