1998 Buick Rivera a/c blower issues?

[[email protected]]

I have a 1998 Buick Rivera 3.8l Supercharged. Recently the blower to my a/c stopped working. I consulted with someone one had the same issue in a different GM vehicle & they recommended that I change the blower motor. I changed the blower motor & I'm still having the same issues. I consulted with someone in the auto parts store & they recommended that it sound like it may be a blower switch. My question is what should I look it to changing before I spend more money on parts that do not need changing?