I have a 96 Lumina 3.1 engine. My fan does not come on at all. I used to be able to get the driver side on by turning on the a/c, but that has stopped also. Temp gage works, fans work, relays work. When I disconnect the temp sensor both fans come on. I'm afraid that the computer is bad. I really don't want to spend $60/hr for somebody to tell me they don't know. Any ideas or steps I can do to confirm or discount the computer?