![A few days ago after car battery change this thing unplugged. Since then the temperature of the coolant on the dashboard goes up and down really fast. Could it be related and A few days ago after car battery change this thing unplugged. Since then the temperature of the coolant on the dashboard goes up and down really fast. Could it be related and](https://preview.redd.it/9zn5m3g2b6z71.jpg?auto=webp&s=d95e09746639ed4422cc2f36f5dcb63642a6330c)
A few days ago after car battery change this thing unplugged. Since then the temperature of the coolant on the dashboard goes up and down really fast. Could it be related and
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