Outer Limits 4x4 Board

hi im after a link or some one half smart to show me a good wiring diagram to run 2 spal 14'' thermo fans. i have a earthed out temp switch 93' on 85' off and would also like a 3way switch with manual over ride for on/off and auto options. would it be a over kill to run them on there own relay in case 1 dies or not needed. i think the fans pull about 10~15 amp each.
thanks scott

other may have adifferent idea

batt *ve into 30
ign power into 86
out of 85 run to middle of switch
one side of the switch to the temp switch then to ground
the other side of the switch goes to ground
87 or 87a to fan which ever one it is.

hope that helps