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The engine temp sensor sends a signal to the computer and the computer grounds the fan relay when it is needed. I'm showing 6 relays on the firewall under the windshield. The two on the right side are high and low radiator fan relays.
I just replaced a set of cooling fan motors for this problem, and the connectors on the motors were even melted, had to replace connector pigtails as well, th fans also cools the a/c condenser so if the fans quit then your a/c will not be very cool unless your driving and the air flow will aid like a fan would..
The radio in my 1996 Buick century had a clock light that did not go off when the car was shut off, so the battery would go dead after 2 days. Disconnected the radio and all was well. Getting ready for a new radio now.
u need to buy the special coolant to your car i have the same car whit the same problem and is cause to the incorrent cooland the cooland to your car is the DEX-COOL if u dont find that u need some hit (silicate-free)
I had the same problem with my 96 buick century and it was the intake gasket. The 1990's buicks all have the same problem where the gasket fails after about 100,000 miles. The radiator fluid then starts leaking in with the oil. Check your oil and make sure it is not high. If it is high, then the intake gasket is your problem. They make a special replacement gasket now that does not have the same issue. However, I doubt I'm going to keep mine another 100,000 miles so I just put in the stock gasket. Hope this helps.