Dodge Repair Questions? Ask a Mechanic for Answers ASAP
The low side port is on the suction line(larger line) which goes from the compressor to the evaporator. If you follow the large line from the firewall back to the compressor, you should find the port in the aluminum portion of the line either between the firewall and the rubber hose or the compressor and rubber hose.
I hope this helps, let me know.