Hey all, new to the forum. I have recently been fixing up my 2001 3.8L LS and just finished assembling and installing the components for my transmission as I had snapped the forward band. At first the car started fine and had no noticeable issues, but because I had not quite put the brakes on yet, I didn't try shifting into gear. After I put the brakes on, I go to start the car, and as the key turns to the on position (before cranking) I hear a very loud pop from the area of the fuse box and all power to the car shuts off (no lights, dash, horn, or even pressing buttons on my key fob). I checked the fuse box and nothing seemed blown (a relay freaking out maybe?) It seems to reset when I disconnect the battery and all electronics operate normally until I go to start the car again. Any advice or pointers would be very much appreciated!