A/c problems

[Fred_House]

My 95' 1/2 ton truck a/c acting up. I have no power to the eletrical plug-in @ the compressor/clutch. I have power to the relay and fuse what could have caused this problem to happen?!

[MT-2500]

Got gas in it?
What are the AC pressure reading?

[Fred_House]

Originally Posted by MT-2500

Got gas in it?
What are the AC pressure reading?

Yes The low side shows 100 psi High side 150psi. Now here's the thing..I have no power to my 2 prong conector that is where I'm confused

[MT-2500]

Originally Posted by Fred_House

Yes The low side shows 100 psi High side 150psi. Now here's the thing..I have no power to my 2 prong conector that is where I'm confused

Power to it is supplied by a 10 amp AC fuse.
Check all fuse in underhook fuse block and power.
There will be two AC fuses a big 50 amp and a small ac 10 amp.
Plus a 25 amp for AC controls.
The small 10 amp powers the low side switch with key on.
Then it goes threw the ac relay before getting to compresser.
Get power to the low side switch orange feed wire and see if the compresser will kick in.
If not post back.
MT

[MT-2500]

If orange low pressure has 12 volts on orange.
Jumper it. if low on gas/r-134a it will shut off compressor.
Check for 12 volts threw it on the dark green out to AC compressor relay on top of heater housing under dash.
From relay a light blue feeds high pressure switch. from high PS a dark green wires feed compressor clutch.