Happy new year guys!

I've been messing around properly installing my airride kit I've a 110/145 pressure switch but for the life of me I cant get the blooming thing working i.e the comp just runs & runs for ever!
I've done some research on t'interweb and I've seen some diagrams were a relay has been used and other not... my switch hasn't any identifying marks on it and only red & blacks wires coming out of it.
Anyway of a) testing it to see if its working and b) wiring the b***er up! LOL
Thanks
Andy