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[FormatC]

I have a HTPC case that uses 80MM fans and I bought some fans from SVC on clearance not knowing how loud 52DBA was (My computer sounds like a hoover vacuum cleaner with all six of them on)  so any way when cliffs fanbus site was still up I saved this image of a 7/12 Volt with a dual color LED I have all of the parts except the led which I will pick up tomorrow
I have the DPDT switch and all of the wiring that I stole from dead fans or Molex splitters/adapters

I follow the diagram exactly and my computer will not turn on all that happens is the fans twitch which means it wired into a short as soon as unplug it the computer will turn on again

   

Thanks

[linear]

There are a couple different types of 3-legged LED. One is common cathode, one is common anode. The diagram doesn't specify, but shows a common cathode type of connection. I think the diagram's okay as drawn.

If you undo the LED connections does it work?

[FormatC]

My Antec True Power II 430 Does not like the 7 Volt trick that's why it was doing that's (It works fine with lower powered fans but I tried to connect 3 AMPS worth of fans using the 7volt trick so that's why It did not work) Each fan draws 0.5A  and I have 6 of them
So any way I went with this circuit instead as the fans still move a great deal of air at 5Volts and are plenty quiet