B1760 — Seat Driver Rear Down Circuit Short To Ground

What is the most common cause of B1760?

The most common causes are: body control module (BCM) fault, corroded or loose connectors, blown fuse or failed relay.

Is it safe to drive with B1760?

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.

What are the symptoms of B1760?

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

How much does it cost to fix B1760?

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

What does OBD2 code B1760 mean?

Seat Driver Rear Down Circuit Short To Ground (B1760): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by body control module (BCM) fault, corroded or loose connectors, blown fuse or failed relay.

B1760 is a body electrical fault code that specifically points to a problem with the driver seat's rear downward adjustment circuit. When your vehicle's control module detects that this particular circuit has shorted to ground, it stores B1760 in its memory. This isn't a random glitch — the module requires the fault condition to appear multiple times under specific operating conditions before it triggers the warning light and logs the code. The freeze frame data captured alongside this code is valuable diagnostic information — it shows engine load, RPM, coolant temperature, and vehicle speed at the moment the fault occurred, which helps pinpoint whether this happens during specific driving conditions or seat movements.

The affected system in question manages power to the motor and switch that control your driver's seat height adjustment. The module constantly monitors electrical flow through this circuit, expecting a certain voltage range during normal operation. When the wiring or a component inside develops an accidental path to ground, current takes an unintended route and the module detects the abnormal reading. Think of it like a water pipe that suddenly develops a leak — the pressure drops in the main line because water is escaping somewhere it shouldn't. B1760 is essentially the module's way of saying it measured that pressure drop and something is shorting to ground.

Unlike powertrain codes, this type of fault does not directly affect how your engine runs or your transmission shifts. The vehicle will still drive, accelerate, and stop normally. However, the specific seat adjustment function linked to B1760 will likely stop working, and the check engine or warning light will stay illuminated until the underlying issue is resolved and the code is cleared.

Common Symptoms

• The check engine or body warning light remains on the dashboard after B1760 sets
• The driver's seat rear downward adjustment fails to respond when you press the switch
• The seat adjustment works inconsistently, functioning sometimes and failing other times
• Other body electrical features like windows, door locks, or interior lighting may act up if wiring damage extends beyond just this circuit
• No noticeable change to engine performance, fuel economy, or transmission behavior — the powertrain remains unaffected
• The fault may reappear shortly after clearing if the underlying issue wasn't actually repaired

Possible Causes

• Damaged wiring in high-flex areas such as door jambs or under the seat, where repeated bending eventually breaks insulation and exposes bare wire to ground
• Corroded or loose electrical connectors at the seat adjustment switch or motor, often caused by moisture intrusion, spilled liquids, or normal connector degradation over time
• A failed seat adjustment switch that has developed internal shorting to ground and needs replacement
• A faulty seat adjustment motor with damaged windings causing an unwanted ground path
• A defective body control module with internal circuitry issues that incorrectly interprets the circuit as shorted even when wiring checks out clean
• A blown fuse or failed relay supplying power to the seat adjustment circuit, though this is less common with B1760 specifically
• Water or debris contamination in the seat adjustment mechanism that creates conductivity between circuits and chassis ground

How to Diagnose

1. Connect an OBD2 scanner, confirm B1760 is present in the codes, and record all freeze frame data — this tells you the exact conditions when the module first detected the fault.
2. Cross-reference any additional codes stored alongside B1760, as related faults often point to the root cause. Also search for any manufacturer TSBs that apply to your specific vehicle, since many body electrical issues have documented factory fixes or software calibration updates.
3. Perform a thorough visual inspection of the seat adjustment wiring harness, looking for chafed wires, melted insulation near heat sources, and any connectors that show green corrosion, bent pins, or moisture residue.
4. Operate the seat adjustment switch while observing live data on your scan tool — monitor voltage and ground signals at the motor and switch to see if they respond correctly or show the short condition in real time.
5. Test the circuit with a multimeter for proper voltage supply, ground continuity, and resistance values compared to specifications, paying special attention to flex points where wires bend with seat movement.
6. Clear the code and perform a complete drive cycle that reproduces the conditions recorded in the freeze frame data, then verify B1760 does not return before considering the diagnosis complete.

Repair Options with Costs

The actual fix depends entirely on what component failed. Here are typical repair scenarios for B1760, including parts and labor at independent shop rates in USD:

• Wiring harness repair or connector replacement — $80–$250: This is usually the first repair to attempt since damaged wiring is the most common cause of shorts to ground. Frayed wires get soldered, insulated, or the affected connector gets cleaned or replaced.

• Seat adjustment switch or motor replacement — $120–$450: If testing confirms the switch or motor itself is internally shorted, replacing the faulty component resolves the code.

• Body control module repair or replacement — $300–$900: In rare cases where all wiring and components check good but B1760 persists, the BCM may need professional repair or full replacement with initialization.

How Much Does It Cost?

Overall, fixing B1760 typically ranges from $80 to $900 depending on which part actually failed. The wide spread reflects the difference between a simple wiring repair and a full BCM replacement. The