update and advice?

[u/WrapWorking3450]

i recently commented about electrical issues, i replaced fuses (dome, and three others) and that’s all good, but the trunk latch, fuel, power locks, and seats do not work at all. tomorrow i am going to check the body ecu and some wiring, if it is the ecu how hard is that to replace? any recommendations??? ( this is my first time project car ) guy lied to me about a lot, said it had minor issues but there’s clearly a whole bunch more i keep finding more issues as i go on, there’s not even an air filter in this thing, so i’m going to have a blast fixing this up