Truck will not start.

1900 Ford Ranger, 2.9 L, Automatic, 95000 Miles.
Truck will not start. No power to fuel pump, no power to ignition. Found no power was coming from the computer through the fuel pump relay, so I replaced the computer.
When I turn the key on, all the lights illuminate as normal on the dash. Engine cranks fine, fuel pump relay closes. No power through contacts of fuel pump relay and no ignition spark. Applied power to the terminal of the relay and the fuel pump will run, indcating the wires are okay from the relay back. Verified the "crash" switch under the right kick panel was not tripped.
Replaced, fuel pump, fuel pump fuse, computer, fuel pump relay. Vefied power at relay. (Relay is closing) Verified fuel pressure (fuel pressure only when power is applied with a jumper @ relay). Replaced computer. All are present or okay.
My best guess now, is that power to the fuel pump and ignition is being stopped somewhere.
Additional information, alternator replaced 6 mo. Ago. Both heads, timing chain and gear and distributor replaced 13 mo. Ago.
Any advice you can add would be grately appreciated.