Hello from Aurora, IL! Bought a Duster with an ignition issue

How big is the added fuse for the ignition? Could it be to small?

The reason I was asking about the regular car fuses is that the ignition power feeds some of them. The radio and heater fan and turn signals are supplied by fuses, so I would think that those fuses would blow if the short was with them.

There are some things like the voltage regulator and ignition module that are not covered by a car fuse. I would suspect those, but that is just a guess.