On a 1984 Cadillac Eldorado Biarritz convertible, the low pressure AC switch is typically located on the accumulator or the receiver-drier assembly, which is situated near the firewall on the passenger side. You may need to look for a round or oval connector with two wires leading to it. It's advisable to consult the vehicle's service manual for precise locations and diagrams if needed. Always ensure the AC system is depressurized before attempting any work on it.
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