1999 Honda Passport. I do have power to the ECU and Fuel pump relays but no power coming off the relay to feed the fuse

There isn't one. Just a relay

https://www.justanswer.com/honda/c55up-1999-honda-passport-gas-cut-off-switch-needs.html

PGM-F1 top left

https://images.app.goo.gl/NWYyYSzLAQKm975s7

https://www.google.com/search?q=1998+%22honda+passport%22+fuel+pump+reset+switch+location
..

Try another relay,can get refund if it doesn't fix problem.

it may be busted fuse and/or deffective relay of fuel pump,check.
or have a shop with scan tool to diagnose exactly the problem came from.

The truck has a 30Amp fuse link supplying power to the fuel pump relay and the main relay, a 15 Amp fuse then protects the fuel pump circuit. Relay is in the engine compartment fuse box it is Good luck to you. Hope this fixex your problem

NO. is the fuse good? is power getting TO the relay? if power is at the relay, you should be able to bypass the relay and feed power directly to the pump. If you are sure there is no power to pump, then the wire has an open between the relay and the pump.

If you have verified a no power condition by pulling the tank and measuring the power signal to the pump then either your fuel pump relay is bad, or you have a bad fuse, or a broken wire somewhere in between.

My guess is that the fuel pump no longer comes on when you turn the key to the on position and that you havent dropped the tank to inspect the pump yes? If this is so you may have a bad fuel pump as well. What I would do is check the fuses for the fuel pump and make sure they are not blown. Then I would check out the relay, visually inspect it, the top should come off of it, look for any burnt wire traces and components inside the relay, you may be surprised to find other relays in your car are the same as the fuel pump relay. Swap one of those out with the fuel pump relay and see if that fixes the problem, this will save you the money of buying a new relay before you know it is your problem. If the relay appears good then you may have to drop the tank and install a new pump. Some vehicles have harnesses under the hood which allow you to feed power directly to the fuel pump so you can test it to make sure it is good before you drop the tank. Some don't. You can feed power directly to the fuel pump by jumping the pins on the relay, I am not familiar with the pinout on your cars relay however and could not advise you which pins to jump to feed power directly to the pump. Get a chiltens or haynes manual, they should have wiring diagrams in them.

Check the power wire at the computer for a short. The computer itself may be bad, causing the fuse to blow. Unplug the computer and see if fuse blows, if it still does, it would probably be in the wiring from the relay to the computer.

The ECU is usually the last thing a mechanic would suspect for a problem, after eliminating other possibilities. And you should concentrate on what happened to the fuel pressure-why did the fuel pump stop working. So you need to check and test the fuel pump circuit.
Look for the fuel pump fuse first of all and check that it is good. Here is how most fuel pump circuits work: The fuse supplies power to the fuel pump relay (under the hood), and when the relay is activated (or energized) by the ecu signal that goes to the coil side of the relay, then the fused power passes on through the relay and to the fuel pump in the gas tank.
If you have no fuel pressure, the pump has quit working. So to test the circuit, you would use a test light or volt meter at the fuel tank electrical connector. Find the wire for the fuel pump and see if it has power on it when the engine is cranking over. If it does have power, then you need to pull the pump off and replace it. If there is no power to the pump when cranking the engine, the pump circuit must be the problem. Better find a wiring diagram, you will need it to diagnose further.

ok first there could be a direct short in the ecu causing the fuse to blow OR the alternator/starter solenoid could be shorting out and blowing the fuse unhook the alternator and see if it blows the fuse then repeat with the starter and the ecu and let me know what happens

have you tested for main power to the fuel pump relay and checked the main fuse???
this is a very common honda fault over in newzealand where im from..having owned a few myself i have come accross, this generally the relay though.. but if you have a good fuse supplying power to relay its the relay or wiring..if not , trace from fusebox back to ecu by passengers foot well....i cant quite remember what pin number is the fuel power but i know it only runs piggy back to ecu so ecu doesnt control it ... try this if no luck try auto sparky