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.
Power Down During Cranking
During starting of the engine certain loads are deactivated to allow maximum voltage to be applied to the starter motor. These loads are then re-introduced over a 2-second period after the engine has started in order to limit the current draw from the battery and load on the alternator.
| Order | Load | Delay after engine start |
|---|---|---|
| 1 | Wipers and headlights | 0.0 sec |
| 2 | Blower motor | 0.5 sec |
| 3 | Power windows | 1.0 sec |
| 4 | Heated rear window | 1.5 sec |
| 5 | Heated front screen | 2.0 sec |
The power down is limited to a maximum of 45 seconds, after which time all loads are enabled. This ensures that functions are not inhibited in the event of an ignition switch malfunction or incorrect cranking signal received by the BC1.
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.
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