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What happens if you disconnect the positive car battery cable?
I need to charge the battery on my car, but I’ve never done it before. I’m terrified of messing something up. What happens if I switch up the wires, like if I disconnect the positive battery cable instead of the negative one?
Bonnie Stinson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
When you change the battery on your car, you want to disconnect the negative cable first since this cable is grounded. If you disconnect the positive cable first, you might have several adverse effects including:
- Tools creating an arc of electricity
- Shorting out electrical components
- Blowing fuses
If you’re not confident with changing your own battery, you can always have your vehicle taken to a repair shop. A mechanic can change your battery quickly and you can have the peace of mind that comes with a professional job.
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