Just installed a NAPA fuel pump on my 93 Country 4.0. New pump has studs for wire hook up and adapters for the wire clips that go on the studs with nuts. Hooked it up the same as stock with + on one post and - on the other. No markings on new pump. The heep would not start. Pump would run when I tried to start but no fuel press. After beating my head for awhile I switched the wires. Bingo cranked right up. So a checked the old one to see if I screwed up and no I did the same as the old pump. Just thought I would post my findings to help soneone else just like this site has done for me many times.