In the engine bay you will have the Computers OBD1 connector, it is loose but on the main wiring harness usually near firewall but have seen them under battery box.
They are used to read codes and check computer so not hidden but they moved them around in the engine bay.
Look here for drawing of the Connector: Ford Ranger - Testing EEC-IV Equipped Engines
On that drawing you will see a slot on the connector labelled Fuel Pump
The wire in that slot is spliced to the Computer's Control wire for the fuel pump relay.
When you turn the key on the EEC relay closes, it sends power(12v) to the EEC(computer), spark, fuel injectors and fuel pump relay.
Fuel pump relay is not grounded so even though it gets 12v if doesn't close to send power to fuel pump.
The computer Grounds the fuel pump relay to turn on fuel pump.
Same as it does for fuel injectors, just FYI.
So back to that slot on the OBD1 connector, FUEL PUMP
It is spliced to the wire the Computer Grounds to start fuel pump.
If the key is on and you GROUND that slot, fuel pump relay should "click" closed and fuel pumps should come on.
If relay doesn't "click" closed then it doesn't have power, check EEC relay is 'clicking" with key on, and check EEC fuse thats the power for fuel pump relay