I have a 2004 deisel FordF250 .fuel pump sound isn't kicking off. on 2004 Ford F-250 Super Duty

The noise use to kick off shortly after the glow plug light went out,but now it doesn't.Is this possibly the fuel pump going out?

1 answer 1 comment
fuel pump runs 20 seconds then shuts off. if not shutting off, relay may be sticking. fuel pump relay is built in to fuse box under dash. not replaceable. does it run ok?
It runs fine.no problems other than an alarm going off constantly.So if its not replaceable,I will need to buy a new fuse box?