It could if you don't get the terminals and motor wires on the correct terminals.
Power and ground
it is the switch turns the compressor on and off if you look in your unit follow the power wires from disconnect the should go straight to the contactor
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
Connect the three wires that come out of the motor to the three supply wires that come from the magnetic contactor. Turn the power on and push the start button. If the motor turns the wrong way, shut the power off and change any two wires in the motor junction box.
There is no power go to the motor. Test the wires to see if there is power to it.
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.
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.
Use a test light on the wires just before the motor to test for power if no power you can test for power at the switch/// you can test the motor by runing power from the battery.
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
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.
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.
if the power wires for the motor happen to be hooked up backwords
Typically there is a plug into the compressor with two wires. They activate the compressor. Just unplug it.
Use a test light to see if the motor is getting power. If it is then motor is bad. If it is not getting power "jump" the wires on the switch to see if window will operate, is so switch is bad
Confirm that you have power Confirm that your circuit breakers have not tripped. Test for power at the motor --- you need a meter --- be careful. do not stand in water on the deck at the equipment. If there is power at the back of the motor where the wires attach to the posts then your motor may be bad.
Use a test light 1 side to ground other to wires on motor
i found the problem - loose wires in the harness
If this is a single-phase motor, it may or may not be reversable. If it is, there should be a wiring diagram on the motors nameplate. If it just has two wires for power and no other changeable connections, it is probably not reversable. You can also look up the model number on the manufacturers website, you may find info there.
If it's a 3 phase AC motor, any two of the three wires feeding the motor.
Undo the power wires, remove the cover bolts and pull out.
Frayed or shorted wires to the window motor.
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.