B1475 — Accessory Delay Relay Contact Short To Battery

OBD2 code B1475 flags a problem with the body electrical system (accessory delay relay contact short to battery). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.

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 B1475 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 B1475 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1475 (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 B1475 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 are the symptoms of B1475?

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 B1475?

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 B1475 clear itself?

Sometimes B1475 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.

What does OBD2 code B1475 mean?

Is it safe to drive with B1475?

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.

The engine runs fine. The transmission shifts smoothly. But somewhere in the body electrical system, a relay contact is shorted to battery voltage when it should not be. That is what code B1475 tells you: Accessory Delay Relay Contact Short To Battery. The body control module (BCM) or the module responsible for delayed accessory power has detected an abnormal voltage condition on one of its relay output circuits. The short means the circuit is being fed constant battery power through an unintended path, either through damaged insulation, a failed component, or moisture bridging two conductors that should not be connected.

Modern vehicles use timed accessory circuits to allow certain systems—power windows, the radio, interior lighting—to operate for a few minutes after the key is removed. The accessory delay relay manages this window. When the relay contact shorts to battery, the affected circuit stays powered when it should be off, or behaves erratically depending on how the short manifests. The ECU logs B1475 once it confirms the condition across one or more drive cycles, protecting the circuit from damage and alerting the driver through the check engine or body system warning light.

When B1475 sets, the freeze frame data stored alongside it is your best diagnostic starting point. That snapshot records engine speed, load, coolant temperature, and vehicle speed at the exact moment the module first saw the fault. Use it to recreate the driving conditions that triggered the code and verify the symptom reappears.

Common Symptoms of B1475

The check engine light, body system light, or dedicated warning indicator illuminates on the dashboard
Affected accessories (power locks, windows, lighting, wipers) operate intermittently, lose function, or behave unexpectedly
In some cases, battery voltage continues feeding the accessory circuit with the ignition off, potentially causing a slow drain over several days
The accessory delay function may fail to activate or may shut off too early
Relays or actuators in the affected circuit may produce clicking, buzzing, or no response at all
In rare cases, associated fuses blow repeatedly after replacement

What Causes B1475?

Chafed or corroded wiring, especially in door jambs, tailgate hinges, and other flex points where wires bend repeatedly
Corroded, loose, or pushed-out connectors allowing moisture intrusion and intermittent shorts
A failed switch, motor, or actuator within the affected accessory circuit
A defective accessory delay relay internally shorted at the contact points
Water entry into the relay or junction box through a failed seal or car wash exposure
Body control module malfunction causing incorrect relay ground or control signals

How to Diagnose B1475

Connect an OBD2 scanner, retrieve B1475, and record all freeze frame data. Note any additional codes present—related body codes often point to the root cause rather than the symptom.
Check manufacturer technical service bulletins for your specific make and model. Many B0xxx body codes have published service procedures, software updates, or known defect campaigns that shortcut diagnosis.
Visually trace the wiring harness for the accessory delay circuit. Focus on areas exposed to moisture, flex stress, or prior repairs: door jambs, under-dash trim, the trunk/hatch hinge area. Look for cracked insulation, green corrosion, or wires pulled from connector pins.
Operate the affected function while monitoring live data—switch state, motor draw, relay command signals. If the PID data shows correct commands but no motor response, the problem lies downstream in the motor or wiring.
Test for continuity and resistance at connectors. A short to battery voltage will typically show low resistance to ground or to another circuit. Wiggle the harness during testing to expose intermittent faults.
Clear B1475, complete a full drive cycle that replicates the freeze frame conditions, and verify the code does not return. If it recurs, the fault is confirmed and repair can proceed with confidence.

How to Fix B1475

Work from the outside in: check wiring first, then connectors, then individual components, and finally consider the module itself.

Repair Action	Parts Cost	Labor Cost	Total Estimate
Repair damaged wiring or connectors	$20–$80	$60–$170	$80–$250
Replace faulty switch, motor, or actuator	$50–$200	$70–$250	$120–$450
BCM repair or replacement	$200–$600	$100–$300	$300–$900

How Much Does It Cost to Fix B1475?

Total cost for B1475 ranges from approximately $80 to $900 depending on what actually failed. Wiring repairs and connector cleaning are the least expensive path and the most common cause. Switching out a failed actuator or motor runs moderate cost. Full BCM replacement or repair sits at the high end and should be confirmed through proper diagnosis before committing. Spending time isolating the exact circuit and component at fault prevents buying an expensive module when a $15 connector repair would have solved the problem.

Can You Drive with B1475?

B1475 carries a short severity rating. Engine operation, throttle response, and drivetrain function are unaffected in virtually all cases. The safety risk is limited to the specific accessory circuit involved. If the short affects exterior lighting or wipers, have it fixed before night driving or severe weather. A central locking short that leaves the doors unable to lock presents a security concern worth addressing promptly. Otherwise, the vehicle remains driveable—schedule repair at your convenience.