a/c, thermos and temp switches

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 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 emergise 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???

Power the fan+ from +12V. Place the thermo relay between fan- and GND. The other relays in parallel with the thermo relay (between fan- & GND, else a singe parallel relay with #86 to IGN +12V, & #85 to the AC switch (assuming it switches to GND) and the manual switch. The other side of the manual switch (and aircon switch) go to ground. The above describes ground switching for both the motor, and the additional relay controls. If any of the above are or have to be +12V - then what/which?