Nope. We're not going to change anything until we know it's faulty.
With the black lead from your test light on the negative post of the battery (not the sheet metal, not the engine) and the key in the RUN position, check both metal lugs on the DOME fuse and the EFI fuse and see if the test light illuminates.
Then check the ENGINE fuse under the dash on the left side.
Here's a picture of how to test the fuses.
Both sides of the fuse should illuminate the test light. If only one side lights it up, then the fuse is bad. If neither fuse lights it up, then that fuse isn't getting power.
So please check the EFI, DOME and ENGINE fuses. This will tell us if AM1, AM2 and ALT are good or not. EFI and DOME are under the hood. ENGINE is under the dash.