You get into your car, get your key out to start your car but no response. If you find yourself in this situation after you have ruled out any possible problems with your alternator, check your car battery and your battery connectors are clean and you have done nothing to drain the battery, then you may have a problem with your main battery fuse. Sometimes battery terminals could be wrongly connected voluntarily or involuntarily and as a result like every other electrical connection, in order to protect other devices or electronics the fuse is blown or disengaged. Symptoms of blown battery fuse comes in various ways and in different vehicles. We will be looking common symptoms and fixes to this problem.

Please follow link below to read more:
https://www.spotdem.com/2019/01/12/when-your-battery-fuse-is-blown-symptoms-and-fixes/