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Re: ac not working windstar 1997
If not blowing air inside the indoor coil is froze up.
If so could be a plugged air filter, faulty indoor blower motor, or maybe low on refrigerant.
You will have to shut it down to defrost completely.
The outside unit has a fan and a compressor, both should be running.
If anything besides a plugged filter have an expert check it out.
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The relay should be a 4 pin. One terminal will have constant power and another will have power with the key on. One terminal will have a constant ground and the other will go to the AC clutch. Jump the power from one of the 2 power terminals to the AC terminal and the clutch should click/engage. Make sure you do not jump the power to the constant ground terminal
Check the fuse & relay (owners manual will show you where the box is)
Relay box in under the hood on the driver side just above the tire.
Inside fuse box should be on the side of the dashboard (driver side) very close to the door hinges.
I'm pretty sure you popped a relay or fuse during the jump.
You can pull the possible bad relay out and grab another relay (borrow it) from something else like brakes or lights.... just make sure it's the same part number.
(don't use fuel or engine control or anything that would stop the car from working)
Swap them and start the car to see if the AC/blower is working.
Check the power feed for the pump at the fuel pump relay. Pull the relay out, and with a test light clipped to a ground, probe all the terminals that the relay plugs in to. One terminal should be hot at all times. If no terminal has power, either a fusible link off the battery has failed or a maxi fuse has blown-check a wiring diagram to see how the relay gets power to it. If the relay has power to it, check the other relay terminals with the engine cranking. When cranking the engine, two terminals should have power-the fuel pump feed, and the signal from computer to activate the relay. If both signals are present, check the pump wire from relay to tank, check the fuel pump ground, and check if the coil side of relay has a good ground-signal from computer goes to coil input side, the coil output terminal should go to ground. Good luck. Post back with what you find.
Looks like the low pressure switch gets power from a 10amp ac fuse. Power then goes to the ac relay which is powered on by the ac heat controller on the dash. Power then goes thru the high pressure switch to the compressor. The ac relay is grounded to the body. Do you have power on the lite and dark green wires going into the relay and is it grounded ?
The low side pressure switch in the AC low pressure line signals the PCM (computer control) to close the AC compressor relay and raise the idle speed. If the system is low on refrigerant charge the relay will not allow the system to engage the compressor, this is because the oil that lubricates all the works is suspended in the AC refrigerant, if that is low then the system gets no lubrication and will quickly seize up..
check the wire terminals from the fan motor, its possible that they are loose. Also check the relays if they are good. Just swap out the other relays to test if it will work. These relays can be found in the fuse box under the dash or under the hood.
just fixed 1 secend relay on left lost its ground in box by bat car had no spark no fuel pump look by d/s strut about 10 inc down u should see 2 wires red / wite put power to red if it starts u lost ground at that relay u have to remove bottom of relay box to fix dont just run power to red wire as repair
Try checking the spacing of the clutch of the compressor to your A/C...chances are the gap is too large and will not pull down to engage the compressor. That should eliminate the jump wire and keep your car snowing. No clutch to engage the compressor, no A/C.