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Q & A: Wiring up a car headlight to a 12V battery

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Most recent answer: 10/07/2015
I want to wire a single car headlight to a 12V car battery. Can I just clip the positive and negative wires from the headlight straight onto the battery terminals? Or would it be safer or necessary to run the wires through a fusebox? What exactly is the purpose of having a headlight circuit fuse on a car?
- David Lee (age 14)
Vancouver, BC, Canada

Hello David,

You can do that directly, although it's a bit safer if you put a fuse in series.   The reason for the fuse in a car is that a short circuit can start a fire.


(published on 10/07/2015)

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