Sounds like a possible eec relay concern. This is the computer relay. I take it you checked all the fuses and fuse links, yes?
The eec relay should be in the engine compartment, and be brown and black and the fuel pump relay should be green and black. I would replaced both of these relays, and retest.
If this still doesn't work, check back with me.
Thanks
FORD MOTOR COMPANY CAR AND POWERSTROKE SPECIALIST FOR OVER 16 YEARS. ASE MASTER SINCE 1991. CURRENTLY WORK AT A MAJOR FORD DEALERSHIP. GIVE ME YOUR FORD PRODUCT QUESTIONS, IF I HELPED, PLEASE HIT THE ACCEPT BUTTON. EXPERTS QUESTIONS ON FORDS WELCOMED