How can jump wire fuel pump relay to start fuel pump to empty tank?

If you have a 4 pin relay marked in clockwise rotation as 87-85-30-86 jump the terminal sockets corresponding to 30 and 87.

For a complete understanding of how relays work, view the first 4 videos on this site.

http://mikestrawbridge.com/blog/2009/09/how-to-jump-the-fuel-pump-relay-on-a-Jeep-cherokee-xj/