New Tests:
The Main Relay clicks, but only on cranking & not just with key on.
The FPR doesn't click under any circumstance. I did confirm that the relay was OK by swapping it into the start relay slot and it works fine.
Following some of the instructions found on the link provided by Graham I tested for voltage btw terminals 11 & 18 on the ECU harness and got 12v when cranking as I should. However, bridging terminals 11 & 19 is supposed to run the pump, but it gives me no voltage anywhere on the FPR.
Also: Bridging #11 & 24 should also give voltage with the key on, but it does not.
In theory this means that the wire to #24 has an issue...
Edit: You can add bridging terminals #11 & 16 to the no-power list too...
