My air conditioner is not working?

I checked the fuses and the relay for power. Both fuses are good. Relay is getting constant 12v power with key off. With key on its getting voltage but not quite 12 volts. Low pressure switch is still not getting power. Here's a picture of voltage with the key on. I checked all fuses just to be safe. All checks out good.

Would that stop A/C from working? Charging system reaches 14 5 volts with nothing on and 13.6 with everything on. So charging system is working.

I replaced the compressor relay that fixed it thank you.

So my a/c compressor has not been able to engage. It has a great amount of refrigerant but when I pass current and stick a piece of wire on this plastic it starts to engage for about a minute until the a/c fuse burns out. Do you think I need a new one of these plastic things? It looks fried up in my opinion. If so would the issue be an electrical issue or a compressor issue.

Hmm, even if the wiring is not that great, I wish I could take a pic of the wiring under the hood, its messed up some wires are exposed and have a direct current.

Stopped blowing cool air when using the AC. It just blows warm air that has not been cooled. I noticed the AC compressor does not appear to be engaging when the AC is switched on. I have checked all the fuses and they appear to be good. What could be going on here? Sould like an electrical problem of some sort.

Joe, Thanks for the advice. I tested the wires going the the compressor clutch and sure enough there was no juice getting that far. Just as I was getting ready to take it to a shop, I looked under the hood and discovered that the switch connection back by the condensor(against the firewall) was disconnected I plugged it back in and the AC cranked right up when I turned it on. It was weird how this connector could have come off because no one had been under the hood to loosen it and it has a little click style keeper to keep it attached. At least it is working now. Thanks again, Rodger.

I can not get power to the a/c compressor clutch. Unit has plenty of freon, I changed the cycling switch, but can not find the a/c compressor clutch relay to check to see if it is getting power. Does anyone have an ideal? It is not on the firewall.

My AC will work when it is not to hot, below 85*, the compressor clutch will engage. But when it is really hot outside and I really need the AC, the clutch does not engage and I do not get any cooling. I do not have any leaks, and have about 40 psi on the low side. Thank you for your help. John

My truck has an air conditioner problem. When I turn it on the compressor kicks on for a few seconds then kicks right back off. It does this continually until the air conditioner is shut off. It is fully charged with Freon, and I have replaced the air conditioner compressor switch. I did pull the air conditioner compressor switch plug in off and ran a wire (shaped like a U) to each side of the ports on the plug. The compressor works with no problems when I do this, however it is not good to leave this like this, so I always plug it back into the air conditioner compressor switch. I am looking for some help or guidance. Any ideas?Thanks!

Everything under the hood works fine. Plenty of Freon. Clutch works fine. AC compressor is new. When I turned on the AC switch, it shows on, but compressor does not engage. Replaced relay. Compressor still will not engage. When I install my test manual relay and flip the switch on, AC compressor comes on and AC works perfect. Also, when I connect my scanner and request permission to activate AC, permission is granted and AC works perfect. Why is it that new relays will not make compressor activate but when using the test manual relay with the switch turned on, then it activates?