Long/short, all repairs require a measure of knowhow and experience. When operating on equipment that could severely shock you or kill you or even worst (if that's possible) someone you love, electricity is nothing to play with. Plumbing mistakes usually are just agravating or costly. Electrical mistakes can be harmful or deadly. If the repair isn't completed correctly just touching the water can harm someone.
So if you don't know or need help, seek direction from a professional.