R -12
Should be R - 134a
R-12
R-12 R-134 started in 1994 IIRC on the Rangers
R-134A
Low refrigerant defective pressure switch
R-12
Unless the system has been converted to R-134A, vehicles manufactured before 1995 use the R-12 refrigerant.
because the compressor must be running to circulate the refrigerant in the system
The 1994 for Ranger pickup truck air conditioning system has a Freon capacity of five pounds. The air conditioning Freon should never be overfilled.
R-12
R134-a
Should be R-134a