fan switch

[Dicko]

I wanna be able to turn the fan on whenever i want by using a switch mounted on dashbaord. does switch on the rad operate a relay or does the switch handle the full current for the fan itself?

i.e. do i need a big F.O switch on dash that can handle the current?

[Ste_Nova]

i had mine running off a compressed air switch off a cav in one of the heated switch holes

http://mig.lathwood.co.uk/upload/a/airrecir.jpg

i had to rewire it as the normal system is ground switching and i wanted the light on the switch to work....

easy enough to make it live switching with a relay.. then use a ground switched feed to click the relay from either the rad or a switch

[Dicko]

i was gonna wire the switch in paralel to the rad sensor.

im guessing this wont work unles its a high power switch?

[Ste_Nova]

i didn't run a relay....

but i would if i did it again... but if using ground switching in parallel with the rad switch then it aint a prob cause it's just ground not live....