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On a 1992 Dodge with a 3.9L engine, the low-side port for the air conditioning system is typically located on the larger diameter line, which runs between the compressor and the evaporator. It is usually found near the accumulator or the firewall, closer to the passenger side of the engine bay. Make sure to check for a blue or black cap, as this designates the low-side service port. Always ensure the system is off and properly depressurized before attempting to service or connect to the port.

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AnswerBot

2mo ago

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