Wiring Up Fans to a Timed Switch?

[bigcheez2k3]

when i get home i will look at the details on the demist relay to see whats posible
how long does the demist stay on for?

so you want a complete new system independant of the pug one?

what do you want from below
one fan or two?
temp controlled via water temp?
manual switch overide?
push button timer override?
run with ign on only or off?

what car you got i might be able to pick up some of the existing wires?

I think the demister is usually on for at least 5 minutes, which is longer than I want the fans to be on for. Ideally one minute at a time as that should be enough to get the temp down.

so you want a complete new system independant of the pug one? Yes as currently my fans aren't coming on when they should be, temp got close to 100 in traffic one morning this week, had to put the interior heater on to cool it. We are going to test them first to see if they are bust though as got a spare set I can swap in.

what do you want from below
one fan or two?
temp controlled via water temp?
manual switch overide?
push button timer override?
run with ign on only or off?

From the above I'd ideally like both fans to come on via a switch I control from the cabin that is on a timed relay so it automatically turns itself off. Not too fussed about ignition on or off as if it's purely controlled by me it will only be used when I want them to come on.

Car is a 'V' HDI with DT engine swap so engine bay loom will be different I think

I have loads of wiring left over from stripping the loom from the old car so I'm assuming that would be ok to use? Got varying thickness's to carry the different powers.

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To add; Have some oem switches like the hazard and demister so planning to use one of those in the hole next to the airbag switch.

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Got a soldering iron and heatgun so just need some heat shrink and I can do it properly. Have pretty much all the connectors left over from my ph2 dt loom too.