intuition for testing source in thevenin/norton

when i have a system of only dependant sources and i want to find its norton /thevenin
representation i need to add a testing source on the ports from whome we want to see the reaction

how to know that i should put a voltage source or current source
?

I think your English is stopping people replying to this thread. Can you be a bit more accurate in what you would like to do please?

Thanks

If you want the norton equivalent you use a current source, and if you want the thevenin equivalent you use a voltage source.