i believe its switched, i bought the one from this install, its from advance auto parts, but seems pretty sturdy...
http://www.fordmuscle.com/arch...x.php
I have all the other wires hooked up correctly i think... just not sure where to hook this yellow one up to, all it says on the instructions is to a 12v ignition switched wire, i'm hoping there is one in the engine bay that i can splice it into