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.
Emergency Light Operating Mode: Notes
An emergency backup hardware circuit completely independent of the BC1 will ensure certain lights can function in the event of a failure within the BC1.
During normal operation a cycling frequency from the BC1 deactivates this emergency circuit. This cycling frequency should be at least 15 Hz. Emergency operation is initiated if this does not take place.
The emergency mode provides the following lights from ignition position 1 regardless of the light switch position:
- Front sidelights
- Rear sidelights
- Low beam lamps
- Left and right brake lamps (when the brake switch is active)
The following functions will not operate in Emergency Mode:
- Direction indicator lamps
- Hazard warning lamps
- Main beam lamps
- Front fog lamps
- Communication via the K-bus
- Instrument/switch illumination
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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