defroster relay stuck on - fan blows all the time on 1997 Cadillac Catera

My defroster is stuck on, I have to pull the fuse, or battery cable to stop the fan. Which relay is associated with the windshield defroster, and how do you safely remove fuses? Started when I pushed on the defroster button.

Asked by for the 1997 Cadillac Catera
You mean the blower motor? Find the fuse associated with the motor and remove it with the key off. You'll need to replace the resistor.
and where is the resistor
Behind the glove box or in the engine compartment...
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