I am assuming you are talking about the A/C. From the compressor, locate the large black hose comming from the A/C compressor. It goes into a small hard line, the valve on this hard line is the low side service port. The hose the comes from the A/C condencer is the high side service port.
Refrigerant is added through the low side service port.
On a R134a system the low side service port is the smaller one.
Where is the low-side port located on a 1998 dodge neon?
You can find the low side on the a/c compressor or on the low side suction hose...........
It is on the side of the head, over the transmision.
The EVAP Service port is on the firewall on the passenger side, right next to the low side service port for the A/C.
It is under the dash on the left side.
It is under the plastic housings on the passenger side of the engine.
it is either on the side of the head or on the thermostat housing
The low side service port can be found on top of the air conditioner compressor. The low side service port will have a blue top.
The low side service port on your 1993 Mitsubishi Eclipse can be found on top of the air conditioner compressor. The low side service port will be labeled as the low pressure port.
The smaller port is the low side.