In common house wiring, black is the power wire, white is the neutral, and green is the ground wire.
It could if you don't get the terminals and motor wires on the correct terminals.
This assumes you have a 12 volt direct motor. You should be able to simply reverse the wires leading to the terminals. There should be two wires going to the motor. Change them around.
It causes the motor to spin.
I am guessing that the dryer is 220-240 VAC as is the compressor. I also assume that the third wire on the dryer is a ground. You need to make sure that the metal chassis on the compressor is not connected to the two wires. You then need to create a covered junction box where you have the two existing wires and a ground wire that you connect to the compressor metal chassis with a screw type connector. Ground wire should be 10 AWG. Now you have three wires. Connect the two hot wires of supply to two original wires on compressor and ground wire to the chassis ground.
The wires and the permanent magnet
It could if you don't get the terminals and motor wires on the correct terminals.
Power and ground
three wires
Disconnect wires from motor and check to see if you have power and ground going to motor--if so motor is bad if not have to check wiring and switch to that motor
3
Mabe your compressor is not kicking on for some reason. Check to see if the front of your compressor starts spinning when you turn it on. If it don't check to see if there is power to the wires that go to your compressor. If there is power you have a bad compressor. If there is not check the fuses or relays.
There is no power go to the motor. Test the wires to see if there is power to it.
the compressor was working and now it has stopped, the clutch spins free but when i put my tester to the wires that connect to the compressor there is no power and the clutch dose not jump on can you help.
All of the 3 wires connected to the compressor motor terminals will carry current while it is running. Depending on the method the mfr uses to cycle the compressor (breaking one or both power legs) some of the wires may remain `Hot` while it is off. A wiring diagram specific to the unit in question will answer that. By earth I assume you mean the ground or green wire, that wire is never intentionally powered.
early nissans have a window amplifier its located on the driver door, its what the switch plugs in to, it looks like a little box. very common problem is they burn out, you wont have any power to the motor and will probably think the motor is bad. check the motor first by putting power and ground to it, (two wires coming from window motor) it doesn't matter which one gets power cause one way up, switch wires and you get down. check motor first they are built well and usually the amplifier wears out first
You don't specify what type of car, but typically there are only a few possiblities. With the AC on (as long as the AC system is properly charged and working), look to see if the AC compressor is engaging. If so, the fan should also have power going to it. Check the wires attached at the fan motor for power. If there is power, the fan motor is failed. If not, then check the fuses and the relay for proper operation. If the AC compressor is not engaged, the fan may not be asked to turn on by the computer that controls it. Then it is a matter of checking the AC system to find the fault.
I'm Guessing that your talking about the A/C compressor, in which there are 1 or 2 wires going to the clutch. Disconnecting this wire(or 2) will disable the compressor clutch stopping the compressor from working.