The game relies quite a bit on triggers so in situations like this where you're stuck someplace because you missed one a walkthrough won't be much help since it won't tell you which triggers there are or which one you missed.

Anyway, if you're supposed to call Jerry to tell him that the fuses are ok:

-Make sure you have fliped both switches in the basement
-Make sure you've read both diaries - one in the study another one in the living room ( you don't have to actually read them but you do have to flip all the pages)
-Put the letter for Barbara in the mailbox (there's a note from the electrician that's supposed to be there at some point although i'm not sure exactly when, check if it's there and if you can call Jerry after that)

If you've done all of that already and you still can't move on you'll probably have to go over the house again examining everything you can and hoefully you'll hit the trigger you're missing.