My 1987 caddy is having " cooling fan fault " I think that there is a glitch somewhere that is preventing the fan from coming on all the time. It is front wheel drive and has one fan in front of the radiator and one behind. My question is can i wire them to a keyed positive or is that gonna fawk up the fans? Also, do electric fans only have pos (+) and neg (-) or is there more to it than that? Thanks!