OLDSMOBILE ALERO COOLING FAN NOT WORKING

I Recently Purchased A 2000 Olds Alero Which Was Very Lightly Used Over The Last 14 Years. I Replaced The Upper And Lower Intake Manifold...

My Car Starting Over Heating So I Checked Under The Hood And Notice I Had Lost Antifreeze From The Surge Tank. I Added More Antifreeze...

My Radiator Fan Only Comes On With The Air Conditioner Being On It Doesn't Come On By Itself And All The Relays Are Working Fine.

I've Been Having Problems With My Car Overheating Because My Coolant Fans Don't Come On. The Relays And Fuses Are Fine Fans Work...