B1407 — Driver Power Window Up Circuit Open

B1407 — Driver Power Window Up Circuit Open. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: body control module (BCM) fault, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.

body electrical

Is it safe to drive?

Short-term driving is OK Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm B1407 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many B0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the body electrical system for damage, corrosion, chafing or poor contact.
Subsystem check Do a continuity test end-to-end on the driver power window up circuit and wiggle the harness while measuring — intermittent opens show up as fluctuating readings.
Subsystem check Operate the affected function while watching its switch and motor PIDs in live data.
Subsystem check Inspect connectors and wiring at flex points (door jambs, tailgate hinges) — wires break there first.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm B1407 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1407 (parts and labor, USD, independent shop rates): BCM repair or replacement: $300–$900; Repair wiring or connectors: $80–$250; Replace the switch or actuator: $120–$450. Overall, fixing B1407 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Is it safe to drive with B1407?

Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How do I diagnose B1407 myself?

Start with a scan: confirm B1407, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the driver power window up, and verify the suspect component against live data before buying parts.

What are the symptoms of B1407?

Drivers most often notice: no impact on engine operation in most cases, the affected function (locks, windows, lighting, wipers) works intermittently or not at all, warning light on the dashboard.

How much does it cost to fix B1407?

BCM repair or replacement — $300–$900; Repair wiring or connectors — $80–$250; Replace the switch or actuator — $120–$450. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Will B1407 clear itself?

Sometimes B1407 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

The stored fault code B1407 points to an interruption in the electrical circuit that raises the driver's power window. When the body control module detects that current cannot flow through this specific circuit, it logs code B1407 and flags the issue. The phrase "circuit open" tells you exactly what happened — somewhere along the path from the switch through the motor, the electrical connection has been broken. That break could be a severed wire, a connector that has come loose or developed corrosion, a blown fuse, or a component inside the window motor or switch assembly that has failed.

Modern vehicles continuously watch these body electrical circuits through the powertrain control module or dedicated body control module. When sensor readings fall outside acceptable parameters for a set number of drive cycles, the module stores B1407 and may turn on the check engine or body system warning light. The freeze frame data recorded alongside the code captures the exact conditions — engine rpm, load, temperature, and vehicle speed — at the moment the fault appeared. This snapshot is the best starting point for diagnosis because it tells you what the car was doing when it detected the problem.

Symptoms

The driver's power window fails to raise or moves sluggishly
Other power window functions remain unaffected in most cases
The affected window works intermittently before eventually stopping entirely
A warning indicator illuminates on the instrument cluster
No impact on engine performance, transmission operation, or other drivetrain systems
Related body electrical accessories may also behave erratically if the root cause involves the main control module

Causes

Internally open driver power window switch or motor
Blown fuse protecting the driver window up circuit
Connector unplugged, pins backed out, or significant corrosion buildup
Broken wire within the driver power window harness
Wiring damaged at flex points such as door jambs or areas exposed to moisture
Corroded or loose electrical connectors at the switch or motor
Failed relay or poor ground connection for the circuit
Faulty body control module unable to properly control or read the circuit

How to Diagnose

Connect an OBD2 scanner and verify that B1407 is stored. Save the freeze frame data immediately — this snapshot records what the engine and vehicle were doing when the module detected the fault.
Look for any related trouble codes. Codes in the B1400 series often share common causes, and a pattern can point you toward the real problem faster. Check manufacturer technical service bulletins for your exact make and model year; many body electrical issues have documented factory fixes or software updates.
Perform a thorough visual inspection of the wiring harness and connectors tied to the driver power window circuit. Look for chafed insulation, broken strands, corrosion, and any signs that connectors have been pulled apart or are not seated properly.
Run a continuity test across the entire driver power window up circuit. With the multimeter leads at each end of the suspected open section, check for an unbroken electrical path. While testing, gently wiggle the harness — especially near door hinges and body passes — to expose intermittent opens that only appear when the wire flexes.
Activate the window switch while monitoring live data on your scan tool. Watch the switch signal PID and the motor command PID. If the module shows the switch input changing but the motor is not receiving power, the problem lies downstream of the switch.
Inspect connectors at the door hinge area and at the motor itself. These are the most common failure points because wires flex thousands of times every time the door opens and closes. Replace any damaged terminals or repair broken wires before condemning the motor or switch.
Clear B1407, complete a full drive cycle that reproduces the conditions from the freeze frame data, and verify the code does not return. This confirms whether the repair resolved the issue or if the fault is still present.

Repair Options with Costs

Body control module repair or replacement: $300–$900. BCM replacement is the most expensive fix for B1407 and should only be considered after all wiring, connectors, fuses, and switches have been ruled out.
Wiring harness or connector repair: $80–$250. Broken wires in the door boot and corroded connectors are among the most common root causes of B1407 and typically cost the least to fix.
Power window switch or motor replacement: $120–$450. If the switch itself is internally open or the motor has failed, replacement restores full window function.

Total-cost range for B1407 repairs runs from $80 to $900 depending on which component is at fault. The $80–$250 wiring repair represents the most common scenario, while the $300–$900 BCM replacement is the least likely. Spending time on careful diagnosis before purchasing parts prevents unnecessary spending on expensive components when a $15 fuse or a cleaned connector would have solved the problem.

Can You Drive with B1407?

B1407 carries a short-term driving safety rating. The code does not affect the engine, transmission, brakes, or steering, so the vehicle remains mechanically safe to operate. Body electrical faults like B1407 rarely prevent you from getting where you need to go. The main practical concern is losing the use of the driver's power window, which may be inconvenient in bad weather or at toll booths. Use manual window cranks if equipped, and address the underlying fault before long trips. If the related body control module fault also affects exterior lighting, wipers, or central locking, take extra care — particularly in poor visibility conditions or when leaving the vehicle unattended for extended periods.