Just did some more MultiMeter tests....
Tested the Plug Ground to the ground at the Rear Right Light and that is good.
Multimeter test on the new Fuel Sender I get about 47 (200ohm) when I connect the Ground to the G Pin.
When I Jump the W to the Ground with a wire on the Plug the Fuel gage goes Full.
Whatever connections you had at both ends when you tested this, were correct, the gauge worked!
The low fuel lamp may not have worked if it was blown, rule that out before you change any wires again
As far as i'm aware
W - blue black - pin 6
G - blue green - pin 4
If you get them reversed, the gauge won't indicate until the tank is empty and the low fuel lamp will probably be on all the time, albeit a bit dim
EDIT - this was driving me mad, so i checked my plug at the sender
As in Leo's photo
W is blue/green
G is blue/black
Which makes everything written in the tech manual incorrect, which i find hard to believe. Must be something simple we're overlooking
I need to investigate more
2nd EDIT
So the images in the tech manual are definitely incorrect
The image of the 12 way connector "Male connector pin assignment under dashboard"
The colours on pins 4 & 6 need to be reversed
There is another image in the manual, a hand drawn schematic, "Female connector pin assignment under dashboard", this needs to be changed as well, and there is another error on this schematic:
Pin 6 should be pin 5
Pin 5 should be pin 4
Pin 4 should be pin 6
If this is agreed, i'll make a note in the manual, does anyone know how to edit these images, or do they need to be redrawn completely?