Post by
jltibbs »
https://forums.nicoclub.com/jltibbs-u32412.html
Wed Jul 09, 2008 2:49 pm
The low (smaller) port is the one you hook up to. The connector will only attach to this port. Turn your vehicle on, A/C on full blast. Hook up to low side, squeeze trigger. When the compressor clutch kicks in, let off the trigger and see where the gauge is. If it is in the blue, you're good. If it's in the green, keep going. If it's in the yellow or red, stop immediately and let some of that stuff out.