A/C low pressure switch on Corsica, where is it?

96 chevy corsica larger v-6 engine 61k miles
A/C worked perfectly until one day, all of a sudden, turn it on and nothing. No a/c. Air blows, but compressor doesn't engage or click or nothing.
I'm thinking low pressure switch.
Where is that located?
TIA
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Check the coolant. When it leaks off the low pressure switch doesn't make. Check for it in the line between compressor and the condenser.....

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