Air conditioner the air conditioner clutch will not engage. If I run a wire straight from the battery it will engage but still will not cool properly. What could be the problem.

You most likely need a new ac compressor

see this steps and think with clearly and logically NOT feared. God bless you
Start with the compressor. Does it engage when you turn on the A/C?
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.

See if it will run by jumping yhe compressor clutch wire directly to the battery ( Be Sure And Use A Fused Jumper Wire) Or you can jumper the two wires that go to your low pressure switch.

check your fuses & wiring also the wires on the A/C switch in the dash to make sure they are connected, the switch or the clutch itself may also be faulty; to check the clutch run a wire from the positive terminal of the battery to the clutch on the air conditioner compressor & see if you can hear it clicking in, make sure you connect it to the positive lead of the clutch,you don't need to have the motor running or the ignition switched on......hope this helps.....cheers

Locate wires coming from compressor clutch and trace to nearest plug that you can unplug. Turn on A/C to max cooling. If clutch not engaged (center of compressor drive pulley not spinning with pulley), unplug compressor clutch wires and use multimeter to check voltage going to compressor clutch. If voltage is around 12 volts or more, then clutch should be engaged when plugged in. Plug clutch wires back in (with motor still running and ac set to max). If clutch still not engaged, then clutch definitely bad because 12V signal should engage it.

Disconnect the power cable and run a wire from each of the two wires from the fan to the battery. Don't worry about polarity. The fan should run straight away. If it does, your problem is most likely with the sender unit. Check that first then the fuse. The sender unit will be on the block. If your fan won't run, it is the problem, but they are strong so I would be surprised. The clutch fan should be able to cool it at idle. Sometimes the clutch material wears out and they don't engage properly. You can make it run all the time by nipping up the adjusting screws in the front. If it still overheats, you may have a problem thermostat or a clogged radiator.

this first to do is check wiring to compressor clutch,when ac is not working check the ac clutch it should be engaged,test for power and ground at ac compressor clutch, you may have a bad wire to clutch or a bad compressor clutch,

Fuse 9, 50A under hood, Fuse 5 15A Instrument panel. If they're ok, make sure the compressor clutch can be turned by hand (engine off, obviously). If not replace the compressor. Most common problem is the cycle switch. That should be the electrical connector on top of the accumulator. Just jump that by backprobing the connector on both sides with a pinand connect them, with the car on and a/c on if the compressor clutch engages, replace the switch. If it doesn't, try wiggling wire harness and watch it, if it engages, find a broken wire and repair it.

start car.turn on air conditioner high cool .raise hood look to see if the compressor clutch is engaged and running.if yes your ac air door could be stuck closed or the air door vacuum actutator not receiving vacuum.a vacuum line is broken or off. or the control switch bad.that control the AC and heater mode. if compressor clutch is not engagged.check for power at compressor clutch.if yes compressor clutch coil open. or the air conditioner refrigerant R 134 is low take car to a private garage with a good reputation. they wont be expensive as the dealership.have them hook car air conditioner to a manifold gauge set to check your refrigerant low side and high side pressure.

looks like fuse # 8 "heater control relay- ac clutch relay-cooling fan" fuse runs the 12 volt side " black and yellow stripe wire " pcm or ecm runs the ground side "red -blue stripe wire"- what else do you need?