Rep Power: 0

Fuel pump doesn't turn on, No spark and No power to the ecu. I have done about everything and i think I've pinned it on the ecu not getting power, A24 along with any other wire in the ecu isn't getting power, but No matter how hard I look No one can tell me where I would chase the ecu not getting power. I thought it came from the fuse box but the 15 Amp doesn't read any power but it is still good along with every other fuse and my main relay is good. Would love some help or advice in the right direction where should I look next for power?