Power distribution box location?/Fuel Relay prob

I have an 87 Ranger that won't start. When I turn the key to ON I don't hear the fuel pumps whirr. I put 12V to the hi-press pump and it goes. I figure I am not getting power to pump. Checked interia swithc, OK, but I don't get voltage into switch. Replaced relay, still no go. When checking voltages on wires in/out of relay, I found wire that my manual says should be hot at all times and there is no voltage. It is the wire coming from the power distribution box. My manual shows a 30A fuse in power box. I want to check this but I don't know where the power distribution box is located or what I am looking for in hood. Any suggestions?

check underhood near brake master cylinder I have a 95 and that is where it is located it will have all your high current fuses as well as pump, a/c and pcm relays. hope that helps