New battery installed improperly, causing it to spark and blow fuses?

Tiny
TAMATI
  • MEMBER
  • 2009 TOYOTA YARIS
  • 1.3L
  • 4 CYL
  • 2WD
  • MANUAL
  • 100,000 MILES
The vehicle listed above is a Hatchback. While installing a new battery I put the wrong terminals on the battery causing it to spark and blowing some fuses which I cannot identify. How do I go about diagnosing the issue and fixing it?
Wednesday, February 26th, 2025 AT 9:04 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
You are on the right track, when this happens fuses are the first place to check.

Here are two guides to help us and the main fuse locations in the images below:

https://www.2carpros.com/articles/resolving-reverse-battery-connection-in-cars-a-step-by-step-repair-guide

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Go ahead and install the new battery correctly and with the systems on start checking the fuses and fusible links. Start with the fuses under the hood, then seem to take the brunt of the problem. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.
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Friday, February 28th, 2025 AT 6:27 PM

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