Wiring In Fans. I R Stupid

[bigcheez2k3]

Right, engine fans don't work, the traffic I sit in after work causes the car to get hot in the current weather so I want to put in the slim fan I have.

I've drawn a rather crude diagram of how I think the wiring needs to go. I'm basing this on a diagram Cully gave me before and some stuff I searched on here. It's 12v 80w so I know that means a 6.66 amp draw, a 7.5amp fuse will do.

I'm thinking this cable will be adequate: http://www.maplin.co.uk/p/twin-core-10a-...etre-xs71n
With this fuse holder: http://www.halfords.com/technology/car-a...lder-20amp

Can I use a relay from the car? I have some spares from the old car. 3 greens, 1 grey and 1 orange.

Finally, I have a spare space next to the passenger airbag switch and a spare hazard light switch that I was thinking of using so it kinda looks OEM still Haynes is telling me I'd need pins 1+7 on that I believe.

Thanks for any help, I tend to stay away from electrics. (God knows how I managed to work in somewhere that made very technical electrical stuff for 18 months)