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Q: altenator on 2008 Toyota Yaris

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
i was replacing the altenator forgot to disconnect the battery the altenator wire arced i completed the installation cranked car no throttle response check engine light p/s light on tire pressure light flashing please advise
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Disconnect the battery again and leave it disconnected for fifteen minutes or longer and reconnect and see if the car now starts and runs. After tat I would say you have to hook up a scan tool to see what codes are stored in the computer. I just worked on a Mazda similar story, owner replaced alternator, caused a short and it damaged the computer in the car ended up being an expensive repair. There are companies that re-manufacture your computer if it has been damaged.
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