1995 pontiac grand am. need to know where to fill the freon

First, freon is no longer available. Your vehicle requires either R-12 or 134A. Take it to a ac specialist.

You do know the compressor must be running to allow the system to be charged, right ?
If the system is low you have to jumper the low pressure switch or otherwise provide power to the compressor to put new cans of freon in.
And it will only go in on the low side of the system, which should be the only side you can connect the hose to.

On this website (link below) you find fuse box diagram and description for Pontiac Grand Prix 1995


Pontiac Grand Prix mk5 Fifth Generation 1995 fuse box diagram Auto Genius

Hello
It wouldnt be cans of freon it would be ounces.Usually about 2 small cans of freon.

None, unless you know how much is already in it. what are you high and low pressures? what is the ambient temp? what is the vent temp? Leave it to a pro. Fix the leak. then have it recharged with the correct amount.

Someone else asked the same question, but different car- I guess they didn't believe me-
The answer is - it's the opposite process. You need to put the refrigerant in the system in order for the clutch and compressor to come on. The refrigerant comes in highly pressurized cans, and it will load into the system through the low side filler valve. Once there's sufficient pressure in the system, the compressor kicks on. At first it will cycle on and off fairly rapidly until the system is adequately pressurized. If the compressor were to run without refrigerant and lubricating oil, it would burn out. I suggest you purchase a gauge( similar to a tire gauge) that hooks up to the same valve that the filler hose hooks up to. It will give a reading of the system charge, so you don't under or over charge the system, and they're relatively inexpensive. They can be purchased in the auto parts store where you get the refrigerant and filler hose.

Hope this helps...

did you open the hp swich located on the high pressure ac lin you have to open the hp swich w/a paperclip in the harnes to open the system to accept the freon your trying to put in open the circut then fill

find the compressor and follow the wider size freon line to the blue cap
that is the one you fill with.
you will need to go to the parts house and get a freon 134a fill kit.
not the conversion kit
just the fill kit.

hope this helps
thank you
jm

Under the hood towards the front of the engine compartment is the condenser. This has two lines on it. One is larger than the other. The larger line is the low pressure line with a blue cap on the service port. To fill the freon you must get a can with a hose that hooks up to this fitting. While the a/c is on max, open the valve on the freon(134a) can and the compressor will start to run. When the line starts to sweat check the temp coming from the vents, the white sticker under the hood will tell you the a/c system capacity. Don't overfill it. Good luck

You take your car to the nearest licensed automotive A/C shop and have them evacuate the system and recharge.

I'm saying this because once you have opened the system, you have let moisture into it. Even a small amount of moisture will damage your A/C system, and needs to be removed. Also, they will know just how much refrigerant to put into the system once it is moisture free.