Where is the 2005 ford focus fuel pump driver module located?

You'll find the fuel pump driver module for the 2005 Ford Focus directly over the fuel pump inside, on the passenger side, underneath the carpet. You'll see a black rectangular box that is plugged into the wiring harness at the bottom. There are going to be two bolts holding it in place, so You can unbolt those, disconnect the wire tabs, and simply lift it up. Signs that the module may be failing will include difficulty in starting Your Focus, with a lot of smoke, stalling, or uneven idling. You might also experience hesitation and misses when driving, or power surges when going in reverse. And, of course, there's a few diagnostic codes that'll come up if it throws a check engine light, like P1233.