Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B1339: Device Power No. 3 Circuit Open: Description
Body Control Module (BCM) monitors condition of load battery voltage supply circuits. When BCM receives 9-16 volts from CLSTR/BCM fuse, BCM tests to verify voltage and grounds are present for BCM outputs. Battery feed circuit, from HTD SEAT fuse, provides power for following items:
- Heated Seats
- Retained Accessory Power (RAP) Relay Coil
- Rear Defogger Relay Coil
- Door Locks
- Trunk Release Motor
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.