RH side (passenger side) near rear of transmission
That is an access port to pressure test the evaporative emissions system.
they exist
it is on the pressure line off the power steering pump itself on the right side of the pump (if looking at the motor)
the return lines are 99% of the time the ones with the smallest diameter.(also are not bolted down like the high pressure one)
Larger line from A/C compressor is the low pressure line
You can find a vacuum line diagram for a 1989 Dodge Dakota by checking the owner's manual. You can also find them at different auto part retail stores.
The large line is generally the low pressure side.
Try Google
The large line is generally the low pressure side.
The 1990 Mitsubishi does not have an air conditioning recharge line. The vehicle has an air conditioning recharge port. You can recharge your air conditioning system through the low pressure port on the air conditioning compressor.
You need a special tool called a fuel line disconnect to release the tabs.