I will try to help since looks like no one else. I know post is old maybe if already solved it will be in search to help someone.
If am pretty sure relay is under driver seat. Wiring diagram is here. Mauirce
Edit if needs replace replace with 255 HP/HV pump. Also make sure the rubber hose out of pump is rated for immersion in gas and for FI. If not you will get to do it again as far as the hose.