I got a can of R134 and hook it up to the a/c connection close to the firewall driverside. The can would not empty out into the a/c system nor change tempture. I put gauge on the same connector and got no pressure. That is strange. If the system is full then I understand that it would not suck anything in from the can. If the system is empty then it maybe to low to suck in the R134 from the can also. Which wires do i use to jump the compressor? Im wondering if something is wrong with the gauge.

Is the a/c connector next to the driverside firewall the correct connector to use in refilling the system?