llplease some one help. i need to know what causes a fac/305 camaros cooling fan(elec)only come on if a/c or bi-level, in in "on" position. what can i do to fix it right. some one cut orig. wires and spliced in to radio wire. i hooked it up to fac. wires and fan won't come on until you put a/c on. HELP PLEASE!!! thanks!