How hard would it be to rig up a warning light/buzzer to activates if a fuel pump fails?

Its not ideal but i got 3 fuelpumps in my car (feeder pump from tank to swirlpot and 2x 044s feeding engine) and a bit worried about one failing and blammo...

I cant look at the pressure gauge all time, and a warning light on thats no good unless iw as happy for it to be lit apart from at full boost...

Any ideas?