headlight failure

Headlight flashing is the act of either briefly switching on the headlights of a car, or of momentarily switching between a headlight's high beams and low beams, in an effort to communicate with another driver or drivers. The signal is sometimes referred to in car manufacturers' manuals as an optical horn, since it draws the attention of other drivers.
The signal is intended to convey a warning to other drivers of road hazards.

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    Total loss of external lights whilst driving in the dark! - 12 volt battery failure indicator

    Anyone lost lights whilst driving? I was driving in the dark (thankfully on a lit stretch of road) when my headlights & I think other external lights went out, & stayed out. I'm not sure what the dashboard indications were at the time (I had bigger things to think about - like seeing where I was...
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    • dashboard warning light electrical system fault external lighting headlight failure mg4
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    • Forum: MG4 EV Forum
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