Ford Fault Code

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B1359

Accessories Stay On / Battery Drain

System

Ignition Switch

Symptom

Accessories Stay On / Battery Drain

Diagnosis & fix steps

LOGIC: Ignition Run / Accessory Circuit Fault (Stuck Closed). ACTION: Inspect steering column mechanical ignition lock cylinder and ignition switch contact block. Verify contact state changes from 12V to 0V when key moves from RUN to OFF.

Red Seal field insights

Contact Arcing: High current running through legacy mechanical ignition switch contact contacts melts plastic sliding blocks, bridging accessory 12V power continuously.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

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Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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