B1474 — Battery Saver Power Relay Circuit Short To Battery #

Note: The wording of this code may differ across manufacturers. Always refer to your OEM (Original Equipment Manufacturer) documentation for exact definitions.

• Battery Saver Power Relay Circuit Short To Battery (General, Ford, Nissan, Toyota)
• Battery Saver Relay Circuit High (Chrysler)
• Power Saver Relay Circuit Malfunction (Hyundai/Kia)

Summary of Code B1474 #

The B1474 diagnostic trouble code (DTC) relates to the Battery Saver Power Relay Circuit—a system designed to preserve battery charge by automatically disconnecting non-essential electrical components after the ignition is turned off. This code specifically indicates a short circuit to battery voltage within this relay’s wiring or control circuit. The vehicle’s Body Control Module (BCM) or a similar controller detects an abnormally high voltage where it expects a ground or lower voltage, typically due to a wiring or relay fault. While not always critical for drivability, ignoring this code may lead to battery drain and unpredictable electrical behavior.

Common Symptoms for Code B1474 #

When a B1474 code is triggered, symptoms can range from subtle to obvious. The most notable effect is unexpected battery drain, as the battery saver system fails to disconnect certain circuits. You may also experience electrical quirks, especially with interior lighting or accessory power, since these features depend on the relay in question. In some cases, warning lights or error messages will appear on the dashboard. Symptoms include:

• Battery discharges overnight or after periods of inactivity
• Interior lights remain on after the ignition is turned off
• Accessory circuits (e.g., radio, power windows) stay active unexpectedly
• Battery or electrical system warning on the dash
• Failure of the battery saver feature to operate

Probable Causes for Code B1474 #

The B1474 code usually points to an electrical short or fault within the battery saver relay circuit. Based on frequency observed in OEM technical bulletins and field experience, the most likely causes are:

1. Short to battery voltage in the relay control wiring (damaged or chafed wire insulation)
2. Faulty battery saver relay (relay contacts stuck or internally shorted)
3. Corroded or loose relay socket connections
4. Body Control Module (BCM) malfunction (much less common)
5. Incorrect or aftermarket electrical modifications (such as alarm or remote start installations)

Step-by-Step Diagnostic for Code B1474 #

Diagnosing a B1474 code requires a systematic approach to isolate whether the issue is with the wiring, the relay, or the control module. Here’s a proven workflow:

• 1. Check for other codes: Scan for additional DTCs that may provide context or point to related circuits.
• 2. Visual inspection: Examine the battery saver relay, its socket, and associated wiring for signs of damage, corrosion, or aftermarket modifications.
• 3. Test relay function: Remove the relay and test its operation using a bench power supply or multimeter. Replace if malfunctioning.
• 4. Check for voltage at relay terminals: With the ignition off, look for unexpected battery voltage at the relay control side using a digital multimeter.
• 5. Inspect wiring continuity: Probe the harness between the relay and the BCM for shorts to power or ground.
• 6. Test BCM output: Using a scan tool, command the relay on/off and monitor responses; replace the BCM only if all wiring/relay checks pass and the output remains faulty.

Possible Repairs for Code B1474 #

The best repair matches the root cause. After a careful diagnosis, address the specific fault as follows:

• Repair or replace any damaged or shorted wiring associated with the battery saver relay circuit
• Replace the battery saver relay if it fails bench testing or shows evidence of internal short
• Clean or tighten relay socket terminals if corrosion or loose connections are found
• Correct or remove any improper aftermarket wiring affecting the circuit
• In rare cases, replace the BCM if it is confirmed defective after all other steps

Can You Drive with Code B1474? #

Limited: While the vehicle will usually remain drivable with a B1474 code, there is a real risk of unexpected battery drain—especially if the affected relay leaves lights or accessories powered after shutdown. Ignoring the code can lead to a no-start condition if the battery discharges completely. It’s best to address this issue promptly, especially if you notice any electrical anomalies or repeated battery problems.

Vehicles Most Commonly Affected by Code B1474 #

Although the B1474 code can appear on many makes, it is most frequently reported on vehicles where the OEM uses a dedicated battery saver relay system. Based on service data, these include:

• Ford (Fusion, Focus, F-Series, Escape)
• Nissan (Altima, Sentra, Frontier)
• Hyundai/Kia (Sonata, Elantra, Optima)
• Toyota (Camry, Corolla in select markets)
• Chrysler/Dodge (300, Charger, Grand Caravan)

Common Mistakes & Best Practices for B1474 #

Diagnosing electrical faults can be tricky, and several common pitfalls can delay repairs or cause repeat failures. Consider these best practices:

• Don’t replace the relay before checking for wiring damage—shorts are often to blame.
• Always test relay operation outside the vehicle to confirm failure.
• Don’t overlook signs of water intrusion or corrosion in fuse/relay boxes.
• Use OEM wiring diagrams to trace the entire circuit, not just the relay itself.
• Avoid jumping circuits or using bypasses; this can damage the BCM or create new faults.

Quick FAQ for Code B1474 #

Still have questions? Here are the answers to what most drivers and technicians ask:

• Q: Will clearing the code fix my problem?
  A: No—clearing the code without repairing the underlying fault will only result in the code returning. Find and fix the real cause first.
• Q: Is this code related to my alternator or charging system?
  A: Not directly. B1474 specifically concerns the circuit that disconnects certain loads to save battery power—not the charging system itself.