[soundman98]

there's harnesses that run down the length of the car next to the door sills on both sides.

the next step, i would go full-in, and pull the interior on the car, inspecting the harnesses for damage along the length going towards the back. it's easier to pull the trunk panels than remove all the seats, so i'd start in the trunk inspecting any wiring harnesses for damage there.

and don't install a larger fuse. if it's blowing immediately, it means there's a short. even assuming that a larger fuse did hold, it would only raise the risk of fire/damage later, making the problem larger than it already is.