I just bought this 6" fan for future use wih a carbon filter and found a great deal on ebay. When I got it though, it has no power chord, no place for a power chord to plug in, no off-on switch or anything. It comes with some screws and the instructions only speak of soldering wires to the proper places, yet all the wiring I can see is properly sealed in a little box unit attatched to the fan. WTF?! I am not an electrician, and even if I was, I'd probably ask that any devices I use would come with a minimum of an "on/off switch." Something! WTF?!
Take it to some place to have them look at it...maybe your close by grow shop ...they could help you for sure
should of bought a Vortex like I told you The fantech FX6 moves 257CFM max and costs more than a Vortex 6" that moves 449 CFM Anyway, since it's too late for that, here's a link to the wiring diagram and installation instructions for you http://www.fantech.net/fx_inst.pdf
This is one of the reasons I don't do business with EBay. If I see a product that I like on EBay I call up on the telephone the store of the seller. That way I can ask lots of questions. If they don't have a store I don't do business. Caveat emptor; buyer beware.