Could some one please help me with a huge favour, at the moment i am struggling with a wiring problem im having.......

I have a thermo fan installed on my car as the only sourse of cooling it has a temperature sending (Derale) unit to automatically turn on as well as a manual override switch however it also needs to tie in with the 3 speed A/C unit (5pin switch) i have installed......

I would like the thermo to have 1 relay, the A/C unit to have 1 relay only and only energise when the switch is turned on and the temp sender already has an inbuilt relay.... Would someone out there be able to do me a HUGE favour and work out a wiring diagram???

Thanks in advance!!