Having found some enthusiasm to get this long build moving again, got most of the electrics working.
Using original sierra loom. From the relay which feeds the pump via a fuse, I have 12 volts at 30 (Red) , 12 at 86 (Black) but also getting 12 volts at 85 (Blue/Red which connects to EEC IV module) and nil volts on 87 (Black/red feed to pump). As the donor was not a runner therefore module unknown good/bad, took a punt on a flea bay replacement for £10 but still the same problem. The relay checks out okay and I have tried a replacement. Any suggestion on where to look now.