Question about 2001 Ford Mustang

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My compressor clutch will not engage ,the fuses,pressure,clutch cycling switch are all good,the compressor was replaced with a new one, about two years ago.when I was checking the pressure I noticed that there was a green oily like substance that came out of the low port on my gauages what is that

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Compressor Oil.

Posted on Sep 01, 2010

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99 chrysler lhs air compressor won't work


unplug the low pressure switch in the air conditioner line near the dryer with air switched on , jump the connector with a short piece of wire to see if the compressor clutch engages. If it does your pressure switch is bad. If the pressure switch is good then there is a fuse near the compressor somewhere that may be blown. If it blows new fuse your clutch is bad.

May 16, 2017 | Chrysler Cars & Trucks

1 Answer

My ac clutch is not engaging..new compressor,dyer and hoses, new relay fuse in engine compartment...if freon is low will that make clutch not engage?


yes there is low pressure cycling switch on low side
bypass those wire and if the clutch engage then your low in freon or switch defect

Oct 02, 2013 | 1996 Chevrolet S-10 Pickup

1 Answer

Ac compressor clutch will not engage on my 98 yukon.


The most common cause of no clutch engagement is a low state of refrigerant charge in the system. Have a set of AC pressure gauges hooked up and bypass the compressor cycling switch and check the pressure on the low side charging port, you show shop 28-32 PSI at idle.

Jun 24, 2012 | Cars & Trucks

1 Answer

2001 f150 a/c compresser clutch wont engage


are you getting power to the clutch compressor? if no power check the "wide open throttle" relay. the relay can go bad and disrupt power to the clutch. also check the voltage on the pressure transducer to make sure it is reading line pressure correctly, will need a scan tool to access this info.

Jun 17, 2012 | 2001 Ford F150 Styleside SuperCrew

1 Answer

A/C compressor on 95 astro van does not engage at all.


There are a few reasons for the compressor not engaging. Lets start with the most common. low ac gas.A bad clutch on the compressor.Blown fuse.
Let is start with testing for low gas. (134a freon).Locate the dryer. this is on the passenger side of engine compartment. it looks like a tall cylinder, on the top side you will see a switch. unplug switch connector and jump the two terminals in connector with a piece of wire, this is the low pressure or cycling switch. you will be completing the circuit by jumping a wire across the terminals.If the compressor turns on when connectors are jumped then you are low on gas and the system needs recharging.
If the compressor does not urn on then check all fuses, if fuses are good then the next step is to go to compressor and test for power and ground. If you have power and a good ground on the connector to compressor then compressor clutch is bad.A bad clutch will some times blown fuses, so if you replace the fuse because it was blown and it blows again then clutch is bad.
Another test that will help is when you remove the connector from the cycling low pressure switch , test the connector. one wire on the connector should have power when ac is turned on,
Hope this helps let me know what the outcome is. Good day.
I have enclosed a picture of the switch and dryer to help you locate it.If you jump the terminals

Mar 23, 2012 | 1995 Chevrolet Astro

1 Answer

Compressor isnt turning at all dont know if i need new one or if i need new clutch how can i tell


The pulley on the compressor is always running when your engine is running, but the only time
it compresses the freon is when the clutch engages, if the compressor's pulley was not turning,
it would have already snapped a fan belt or your serpentine belt. voltage runs from your fuse box
thru your air condition switch on your dashboard to a low pressure switch that is located at the
accumulator a long cylinder,close to the firewall under the hood or close to the condensor, front
of the car. the switch detects freon pressure in the accumulator, if there is freon pressure, the switch
will stay closed and allow voltage to go to the compressor clutch to engage it and compress the freon,
if there is no freon pressure the switch will open, and there will be no voltage to air compressor, its a
saftey switch to keep your compressor from getting damaged.its possible that the switch could be bad
it may not have voltage at the switch, or it may be open because there is insufficient freon pressure.
check and make sure there is freon in the system.check for voltage at the low pressure switch if you have freon in your system and voltage at the pressure switch, set your ac on high, pull the molex off
the switch, and jump it out with a jumper wire, if the clutch engages and your car starts to cool, just
replace the switch. if the clutch engages but does not cool, then your ac system has some blockage
in the lines. if the clutch does not engage at all then it would be the compressor clutch. good luck!

Aug 03, 2011 | Buick Century Cars & Trucks

1 Answer

Compressor will not engage on 2001 Impala? Where is low pressure switch located on 2001 Impala


It is located by the accumulator or dryer , a long canister shaped part, that will

have a pressure switch attached to it, and a two wire molex, if there is freon pressure

in the cannistor, the switch will close and send voltage to engage the clutch on

the compressor, if there is no voltage there the clutch will not work and you may

have a blown fuse or bad switch on your dashboard. i would check for voltage

at the pressure switch 1st, if its there, pull the molex off , jump it out and see if

the clutch engages. if you have power and you jump out the molex and the

clutch does not engage, you could have a bad clutch or bad compressor.

if it does engage, just replace the pressure switch, if you do replace it, make

sure to lube the seal with pag oil. good luck!

Jun 28, 2011 | 2001 Chevrolet Impala

1 Answer

I have a 02 lincoln ls . the air conditiong is not working . i took it to a local shop they check the compressor, fuses, relays, pressure swithches, all is checcking out good. They jump the compressor...


YOU COULD HAVE OPEN OR SHORT IN THE BLACK YELLOW WIRE GOING TO AC COMPRESSOR CYCLING PRESSURE SWITCH. CHECK FOR A SHORT OR OPEN IN RED YELLOW WIRES AT THE AC PRESSURE CUTOFF SWITCH. USE VOLT METER AND CHECK FOR VOLTAGE AT BOTH SWITCHES. PROBLEM COULD BE IN THE EATC MODULE THAT SEND POWER TO PURPLE WIRE THAT FEEDS THE AC PRESSURE CUTOFF SWITCH AND AC CLUTCH CYCLING PRESSURE SWITCH THEN FEEDS THE AC COMPRESSOR CLUTCH SOLENOID.

Jun 24, 2011 | 2002 Lincoln LS

3 Answers

Cannot locate where the a/c clutch cycle switch is... there is no power in the wires to the clutch and fuses are okay.


The a/c clutch is attached to the front of your a/c compressor. It is the part that your serpentine belt runs on. It is either engaged or not based on the demand of the a/c system. It will not run if it senses low pressure in the freon supply line so you might try having the system checked for proper fill before replacing the clutch.

May 29, 2009 | 1996 GMC Jimmy

1 Answer

A/C Clutch not engaging on my Tuarus 1998


YOU CHECKED ALLOT BUT YOU DID NOT MENTION THE AC COMPRESSOR CYCLING SWITCH, DID YOU TEST IT? DOES THE COMPRESSOR RUN IF YOU JUMP IT, HAVE U CHECKED TO SEE IF THE COMPRESSOR TERMINAL HAS 12 VOLTS AND GROUND WHEN TURNED ON? THE CYCLING SWITCH AND THE COMPRESSOR CLUTCH ARE ALMOST ALWAYS THE PROBLEM WHEN THE SYSTEM IS CHARGED BUT THE COMPRESSOR DOES NOT RUN.

Sep 11, 2008 | 1996 Ford Taurus

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