inop cruise

2002 pontiac sunfire?4drapers@gmail.com....I have no cruise blower motor works only with two speeds and rear speakers do not work unless the ambient temp is more than 70 .Ive tested the switch at the module and have all inputs with power but no cruise.I took the module apart and found no obvious problem.If you have any suggestions they are welcom.By the way,I have replaced all the rear light bulbs.Thanks