Yaris total shutdown

[xdarkxfirex]

^ I second that. There are also mega fuses in the box and smaller ones. Under the steering wheel there are a few mini fuses. Easiest way to check is with a multimeter. I had the same problem with the car acting strange after I was working on the alternator without disconnecting batt. It ended up just being the battery mega fuse, but in your case, did you change anything? Maybe your alternator is defective and overcharging.