I've looked over many of the Q & A's regarding wiring the fan using an AC adapter and still don't know what I'm doing wrong. I got a pc fan from ebay. (Antec Nine Hundred 900 Fan TriCool 120mm) Didn't realize 2 things when I purchased it. 1. It's pretty big and 2. It has a switch to change speeds. The A/C adapter has a black wire and a black w/white stripe. The fan has a black wire and a red wire and a third wire which has the speed control switch. I wired the black AC to the black fan. I wired the black/white AC wire to the red fan wire. It didn't work so I switched them. Still nothing. I moved the speed control switch to all 3 positions.. Still nothing. Any ideas?