Hi

There should be 2 connections
1. Power from the battery
2. A switch from the thermostat which turns on the fan when the water
temperature reaches a certain temperature.

Also there should be two cooling fans
1. For the radiator
2. For the Air Conditioner

I am talking very general here not specifically about a Buick.
Other pointers to a malfunctioning thermostat are overheating as you drive
more, pinging.

Good Luck

I could be off base here, but doesn't your vehicle have a mechanical fan
to cool the engine?  If so, the electric is only supposed to turn on
when the AC turns on or when the engine overheats, it doesn't run
normally.

If you only have the electric fan, then I would start by checking the
switch near the thermostat to see if it has failed.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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