SAI Pump diagnostics with Durametric,Bentley and Multimeter - FAILED !

[Gelbster]

Thanks for all the replies.I very much appreciate the help fellow Forum members.
Sooner or later it seems many of us get this SAI problem so bookmark this and the links for when it is your turn !
An ROW reflash would be my last resort.That eliminates the whole SAI system from the Readiness test.
Some people say the SAI is more trouble(=cost to repair) than it is worth in emissions benefit. For that reason, the Rest Of the World do not use SAI. The SAI runs for about 60-90 seconds immediately after a cold start. The SAI system is getting a command from the DME but there is a break in the power to the pump somewhere.
78F350 - thank you for the location. Yes ,it is the white one. The adjacent connector is black. I had checked that white connector block because I just traced the red conductor from the relay tray(40A Maxi Fuse) back there. There is no 12v + power from the appropriate pins in the 'feed' side of this connector. So basically the entire rear relay tray is 'dead'. I also checked both sides of the 40A fuse connectors for a fault to ground - no continuity to ground.
BTW anyone trying to separate this type of connector - be careful ! Pull out the big tab on the face. Wiggle the tab and pull toward you firmly until the top of the connector moves upward. Then it is free to be removed. Do not try to force it. Just keep doing push-pull on the big tab until the top of the connector jumps up a little. The tap has little ramps alongside the connector and these will lift the top of the connector when it is fully released. If it does not pop up,it is not fully released yet .I hope this helps.