"Don't have a manual and i'm too lazy to look up wiring diagrams."
Unfortunately, a statement like that isn't going to get you much sympathy or have people rushing to help.
From your post you appear to have an electric fuel pump which isn't standard. What else has been changed? A few details of the car and what you've tried, if you've actually tried anything, might at least be enough to get a suggestion or two. If you want engine bay images try Google Images. For Volvo workshop manuals go to http://www.volvoamazonpictures.se/. They are all there.