Hello Mick, in the Top of this site you can see "Diagnosis, Shop and Community.
Click on Community and scroll in the new Window to the bottom.
Here you can see the Manufacturer Symbols in the board of brands. Click on the FIAT Symbol.
Now in the new window you have to click in the right side on your type of car.
Also means Panda, before you could see this, click on the small "see more..", then you´ll find Panda, click on this.
After this you must select the Panda 169, click on it.
Then Comes a new Windows nad you must scroll some down, if you see the wiring diagrams then click on it.
Now you can chose your "Fuel preparation". select this and it should open, because you must sell this Diagram.
So, i think that i could help you.