Question about Ford Mustang

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I have a 3.8 V6 in my mustang.My AC compressor clutch dose not engage.I checked the wire from the compressor too wear it goes into the Horne's.Not getting power.Then I checked the back of the switch on the dash.I found the purple operating wire.I followed it all the way to the passenger side. And moved the clove compartment & side panel.I am getting power all the way to that side.My fan & fan speed works.I used my test light on presser switch.Tested both wires and got power. IS THEAR SOMETHING ELSE ?

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You start your car and set the Air Conditioning to maximum and yet it does not blow out cold air. You pop the hood and the the Air Conditioning Compressor Clutch will not engage, so lets figure out why not. With the ignition key on, unplug the low pressure switch (clutch cycling switch) and place a jumper wire across the connector. The switch is generally located on the side of the accumulator. If the compressor clutch does not click in then you need to check for Battery Voltage at the connector first.

I have a 3.8 V6 - b6dd446.jpg-2703d77.jpg

If No battery voltage is present, then check the fuse. If the fuse is good you will need to repair the wiring between the fuse and the low pressure switch connector.

If there is battery voltage at the low pressure switch connector and the clutch does not click in when the jumper wire is attached, then you will need to move to the A/C Clutch Relay.

Make sure you have good battery positive and ground at the relay. If you do not receive a 2nd battery voltage when the jumper wire is attached, then the wire may need to be replaced...

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If you do have 2 positives, a good ground but do not see power leaving to the compressor clutch you will need to replace the Air Condition Clutch Relay

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If you do have Power leaving the A/C Clutch Relay and heading to the compressor but not power at the clutch, then replace the wire between the two. If you have power at the compressor AND IT DOES NOT Click in (engage) then you need to replace the compressor.

Hope this this can help to solve it.

Posted on May 22, 2010

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1994 ford mustang 3.8 liter a.c. compressor clutch will not stay engaged, blower fan works but not cold. freon is good


What is the pressure in your low pressure side at 80 degrees ambient? Did you use gauges?
U said the clutch will not stay engaged, meaning that it engages and then releases. If so, that means the clutch winding is good but that perhaps you have a loose wire feeding the clutch or a bad, intermittent relay. And if that is not the case then you are LOW in freon and the low pressure cut off switch is disconnecting the clutch when the pressure goes down. Pressure should be around 35 pounds on suction line at about 3000 rpm.

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I have a 2001 Ford Mustang V6, the ac is blowing warm air. We checked the refrigerant and it is full. The ac compressor will kick on for a few seconds and then kick off. Why is the compressor not staying...


it's either low (in spite of your readings) or your a/c clutch is not working correctly or you have too big an air gap in the clutch.
First, just disconnect the 2 pin connector from the a/c pressure cycling swithc and jumper the 2 pins with a wire to force the clutch to stay engaged. See if it blows cold then, and stays engaged. You can run this way for about 15 minutes before you have to pull the plug.
report reulsts.

please don't forget to rate.

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The White/Blue wire goes back from the AC magnet clutch to the AC amplifier, terminal 14

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Hi

This could be any number of things, low system pressure, chattering relay, faulty cycling switch, failed compressor, poor cooling, the list goes on.

I'm afraid this is a job for the professionals!

Very best regards

Geordie

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