SC400 92 crank sensor wiring check!

[Bollox]

Looking for some guidance here, 50-50-50 ECU pin 7 and pin 27 are the cranks sensor wiring, does anyone have the correct orientation, as I think I have it backwards, I have pin 7 closest to the engine, is this correct, I'm experiencing over fueling in the bank one

 

[Bollox]

OK looks like the 27 pin is the positive and the 7 pin is negative, anubody know how to test the sensor to tell the pins apart?

 

[gloverman]

The plug has numbers on the back. Looking at the back #1 is on the right with the clip at the top.