B1416 — Power Window LR Motor Circuit Short To Battery

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 B1416 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 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 B1416 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1416 (parts and labor, USD, independent shop rates): Replace the switch or actuator: $120–$450; Repair wiring or connectors: $80–$250; BCM repair or replacement: $300–$900. Overall, fixing B1416 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

What is the most common cause of B1416?

The most common causes are: corroded or loose connectors, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.

What are the symptoms of B1416?

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.

What does OBD2 code B1416 mean?

Power Window LR Motor Circuit Short To Battery (B1416): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by corroded or loose connectors, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.

Is it safe to drive with B1416?

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 B1416 myself?

Start with a scan: confirm B1416, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the body electrical system, and verify the suspect component against live data before buying parts.

The engine control module logs code B1416 when it detects an abnormal voltage condition in the left rear power window motor circuit — specifically, a short to battery. This is a body electrical fault, not an engine or drivetrain issue. When the affected window switch is activated, the module expects a specific voltage pattern at the motor. If it sees battery voltage on a signal line where it shouldn't be, B1416 sets and the MIL (malfunction indicator lamp) illuminates.

Body control modules in modern vehicles manage a network of switches, motors, and actuators throughout the cabin. Each component communicates through dedicated wiring and connectors. The left rear window motor circuit includes the switch assembly, the motor itself, and the wiring that runs through the door jamb — an area prone to wear and moisture exposure. The module won't trigger B1416 from a single glitch. It requires the fault condition to appear repeatedly under the same operating parameters before it confirms the failure and stores the code. That is why the freeze frame data saved with B1416 is so valuable — it records engine load, RPM, coolant temperature, and vehicle speed at the exact moment the module first detected the problem, giving you the conditions to reproduce during testing.

Addressing B1416 starts with understanding that this code signals a short-to-battery condition somewhere in the left rear window circuit. The short could be in the wiring, a connector, the switch, or the motor winding. Visual inspection of the door jamb wiring and connector terminals is almost always the first practical step before replacing any expensive components.

Symptoms

No change to engine performance or drivability in most cases
Left rear power window fails to respond to switch commands
Left rear window operates intermittently or only in one direction
Dashboard warning light stays on after the fault is detected
Related body functions (other windows on the same circuit) may behave erratically
In some configurations, the window auto-reverse safety feature may stop functioning

Causes

Broken or chafed wiring in the left rear door jamb from repeated flexing
Moisture intrusion causing corrosion at connector terminals
Faulty left rear window switch with internal short
Failed window motor with shorted windings
Body control module misinterpreting the circuit due to voltage cross-talk
Blown fuse protecting the window circuit or failed relay in the power distribution center

How to Diagnose

Connect an OBD2 scanner and confirm B1416 is stored. Record the freeze frame data — this shows engine conditions (load, RPM, temperature, speed) when the fault first appeared. Replicate those conditions when testing to trigger the problem.
Pull all related trouble codes. Codes in the B1400–B1499 range often share common ground or power circuits. Identifying a pattern helps isolate the root cause faster than testing each component in isolation.
Perform a visual inspection of the left rear door harness and connector. Focus on the door jamb pass-through where wires flex every open and close cycle. Look for cracked insulation, rubbed-through wires, and white or green corrosion on terminals.
Test the left rear window switch with a multimeter for continuity in each switch position. A shorted switch will show battery voltage on signal lines that should read ground or near-zero.
Monitor the window motor circuit using live data on a scanner that supports body control modules. Actuate the switch and watch voltage readings at the motor — unexpected battery voltage confirms the short.
Clear B1416, complete a full drive cycle matching the freeze frame conditions, and verify the code does not return. If it recurs, the fault is confirmed and repair is needed.

Repair Options

The cost to resolve B1416 varies significantly depending on which component is at fault. Independent shop labor rates typically run $75–$110 per hour.

Window switch replacement (left rear): Parts $45–$150, labor 0.5–1.0 hour. Total: $120–$450
Wiring repair or connector replacement: Parts $20–$80, labor 1.0–2.0 hours. Total: $80–$250
Body control module repair or replacement: Parts $200–$600, labor 1.0–3.0 hours. Total: $300–$900

How Much Does It Cost to Fix B1416?

The total bill for B1416 typically falls between $80 and $900. Most failures trace back to the switch or damaged wiring in the door jamb — both relatively inexpensive fixes. The body control module replacement is the upper end of the range and should only be considered after wiring and switches are ruled out. Spending $30–$50 on a proper diagnosis before purchasing parts is almost always cheaper than replacing a good module because the underlying short was never found.

Can You Drive with B1416?

Yes — B1416 is generally safe to drive. The fault affects cabin comfort and convenience, not engine operation. However, if the short causes other body functions to behave unpredictably, or if the window becomes stuck in an insecure position, address it before it becomes a problem. Driving in heavy rain with non-functional window seals or in extreme cold with a frozen window is not recommended.