2000 Silverado AC

nevlis wrote:

I tried hooking up power directly from the battery to the AC and the clutch does try to engage but it stalls out the truck... I was wondering if this means the AC compresson is done seized or just not enough refrigerant? Someone told me that the AC might not be able to be turned on because the refrigerant is empty.. I just need a few ideas before going to the garage.

Well you are correct about two things, the compressor is toast and the reason it does not try to work on its own is because the freon is low. You need to replace compressor, receiver/dryer and expansion valve/orifice and screen, add correct amount of oil and recharge system. No quick and easy fix here.
 >> Stay informed about: 2000 Silverado AC 

steveecook.TakeThisOut@webtv.net (Steve Cook) wrote in news:12508-429B715F-308
@storefull-3238.bay.webtv.net:

 >
 > 2000 Silverado AC
 >
 > Group: alt.autos.4x4.chevy-trucks Date: Mon, May 30, 2005, 1:33pm
 > (CDT+5) From: silven.TakeThisOut@removesilven.canada.com (nevlis)
 > Hi all,
 > I bought a used 2000 Silverado and the AC has never worked. When i try
 > turnning on the AC nothing happens (no light nothing), I tried hooking
 > up power directly from the battery to the AC and the clutch does try to
 > engage but it stalls out the truck...
 > I was wondering if this means the AC compresson is done seized or just
 > not enough refrigerant?
 > Someone told me that the AC might not be able to be turned on because
 > the refrigerant is empty..
 > I just need a few ideas before going to the garage.
 > Thanks
 > nevlis
 >
 >
 > If it detects low or high pressure the clutch will not come
 > on....Disconnect the cycling switch from your dryer..Jump the two wires
 > your compressor will come on if it has power...Have you even hooked up
 > some gauges to it?It would tell you right away if you had any charge in
 > the system....Not really enough information for a poper diagnosis..But
 > you can turn on the compressor by jumping the switch even if there is
no
 > charge in it...As long as it has power...Could be any thing bad cycling
 > switch ,,AC relay,Compressor,low charge due to leakage,High pressure
due
 > to blockage,A shorted control head.. But like i said not enough
info....
 > S Cook.
 >
 >

Hi Thanks for the reply,

I did not hook any guages at all to it. The only thing I did so far was
I tried jumping the wires directly without disconnecting the cycling
switch, the clutch did try and engage because it stalled out the truck.

Would stalling out the truck be normal with the jumping procedure I just
mentioned?

I am just trying to find out a little info before going to the garage.

Thanks

nevlis<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

You must need a new compressor if it stalls the truck when you jump it.
It shouldn't stall the truck, period.
 >> Stay informed about: 2000 Silverado AC 

"Robin AndrePont" <RTAndrePont.DeleteThis@webtv.net> wrote in message
news:4458-429B98A8-183@storefull-3218.bay.webtv.net...
 > You must need a new compressor if it stalls the truck when you jump it.
 > It shouldn't stall the truck, period.
 >

Agreed.
H<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

Re: 2000 Silverado AC

Group: alt.autos.4x4.chevy-trucks Date: Mon, May 30, 2005, 6:50pm
(CDT+1) From: RTAndrePont.RemoveThis@webtv.net (Robin AndrePont)
You must need a new compressor if it stalls the truck when you jump it.
It shouldn't stall the truck, period.

Not true...Now do you have a manual or a automatic HVAC system.?Also you
need to jump your cycling switch from terminal to terminal ...Not your
high pressure switch considering the said he induced voltage to the
switch I believe it has a 5volt refference sending 12 volts through it
would for sure stall the engine when it detects high voltage like
that..This system dont run power off of a high pressure switch but the
cycling switch the high pressure switch is a reference sensor for the
PCM...Which will make it stall I done know how many times Ive seen it
shorted to power inducing too much voltage and stalling...The easiest
way insted of just changing parts you dont know are bad ...Is to jump
your cycling switch see then if the clutch comes on...If it does does it
get cold? If it dont see if you have power from the fuse box to your
cycling switch....If it does get cold and works normally..Replace your
cycling switch....By the way does your switch have a brown band around
it?????? If it does there is a updated switch for it ....There is a TSB
for the switch...
S Cook
 >> Stay informed about: 2000 Silverado AC 

Re: 2000 Silverado AC

Group: alt.autos.4x4.chevy-trucks Date: Mon, May 30, 2005, 8:50pm From:
hairy RemoveThis @hotmail.com (Hairy)
"Robin AndrePont" <RTAndrePont RemoveThis @webtv.net> wrote in message
news:4458-429B98A8-183@storefull-3218.bay.webtv.net...
You must need a new compressor if it stalls the truck when you jump it.
It shouldn't stall the truck, period.
Agreed.
H

He didnt jump it he indused power....Not the same thing...
S Cook
 >> Stay informed about: 2000 Silverado AC 

Robin AndrePont wrote:

You must need a new compressor if it stalls the truck when you jump it. It shouldn't stall the truck, period.

Yes, the compressor is toast and locked up and not from charge but siezure. (though it may have failed for improper charge to begin with, it is trashed) To think otherwise is dreaming and a waste of time.
 >> Stay informed about: 2000 Silverado AC 

Robin AndrePont wrote:
 > You must need a new compressor if it stalls the truck when you jump it.
 > It shouldn't stall the truck, period.
 >
Not necessarily. There should be an enriching mode to dump more fuel into the engine when AC is
called for. If the computer is not seeing that AC is being requested, no enrichment would occur.
Forcing the clutch on at this time with no extra gas could stall the motor.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

"Steve Cook" <steveecook.TakeThisOut@webtv.net> wrote in message
news:19134-429BC555-480@storefull-3234.bay.webtv.net...
 >
 > Re: 2000 Silverado AC
 >
 > Group: alt.autos.4x4.chevy-trucks Date: Mon, May 30, 2005, 8:50pm From:
 > hairy.TakeThisOut@hotmail.com (Hairy)
 > "Robin AndrePont" <RTAndrePont.TakeThisOut@webtv.net> wrote in message
 > news:4458-429B98A8-183@storefull-3218.bay.webtv.net...
 > You must need a new compressor if it stalls the truck when you jump it.
 > It shouldn't stall the truck, period.
 > Agreed.
 > H
 >
 > He didnt jump it he indused power....Not the same thing...
 > S Cook
 >

From his description, it's hard to tell exactly what he did.

"I tried
hooking up power directly from the battery to the AC"

"I tried jumping the wires directly without disconnecting the cycling
switch"

It all depends on what he did and how he did it.
H<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

Stephen Young wrote:

Robin AndrePont wrote: > You must need a new compressor if it stalls the truck when you jump it. > It shouldn't stall the truck, period. > Not necessarily. There should be an enriching mode to dump more fuel into the engine when AC is called for. If the computer is not seeing that AC is being requested, no enrichment would occur. Forcing the clutch on at this time with no extra gas could stall the motor.

You are dreaming! The compressor is locked up if it stalls motor and if he tries to beleive otherwise he will wind up needing a new drive belt too when it smokes it trying to get a locked compressor going. I have seen them lock up going do the road and take out drive belts under the hood. If happens sometimes and you need to replace the parts and move on. 3 years ago I was with a friend when the compressor locked up in his 95 GMC van going down the road and smoked the drive belts. We replaced it, dryer and expansion valve/orifice and recharged system and it still works good today.
 >> Stay informed about: 2000 Silverado AC 

Stephen Young <stephen DeleteThis @nospam.net> wrote in
news:aLPme.18001$bD5.2831@fe07.lga:

 > Robin AndrePont wrote:
  >> You must need a new compressor if it stalls the truck when you jump
  >> it. It shouldn't stall the truck, period.
  >>
 > Not necessarily. There should be an enriching mode to dump more fuel
 > into the engine when AC is called for. If the computer is not seeing
 > that AC is being requested, no enrichment would occur. Forcing the
 > clutch on at this time with no extra gas could stall the motor.
 >

Ok guys thanks for all the replys... I just want to note that I am in no
way a mechanic of any type.

All I did was take two wires one from the positive side of the battery and
one to the negative side and touched them to the two wire plug found at
the top of my AC compressor... I believe one wire was black the other
green. At that point the truck stalled.


Thanks
nevlis<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

steveecook.RemoveThis@webtv.net (Steve Cook) wrote in news:19134-429BC351-477
@storefull-3234.bay.webtv.net:

 >
 > Re: 2000 Silverado AC
 >
 > Group: alt.autos.4x4.chevy-trucks Date: Mon, May 30, 2005, 6:50pm
 > (CDT+1) From: RTAndrePont.RemoveThis@webtv.net (Robin AndrePont)
 > You must need a new compressor if it stalls the truck when you jump it.
 > It shouldn't stall the truck, period.
 >
 > Not true...Now do you have a manual or a automatic HVAC system.?Also
you
 > need to jump your cycling switch from terminal to terminal ...Not your
 > high pressure switch considering the said he induced voltage to the
 > switch I believe it has a 5volt refference sending 12 volts through it
 > would for sure stall the engine when it detects high voltage like
 > that..This system dont run power off of a high pressure switch but the
 > cycling switch the high pressure switch is a reference sensor for the
 > PCM...Which will make it stall I done know how many times Ive seen it
 > shorted to power inducing too much voltage and stalling...The easiest
 > way insted of just changing parts you dont know are bad ...Is to jump
 > your cycling switch see then if the clutch comes on...If it does does
it
 > get cold? If it dont see if you have power from the fuse box to your
 > cycling switch....If it does get cold and works normally..Replace your
 > cycling switch....By the way does your switch have a brown band around
 > it?????? If it does there is a updated switch for it ....There is a TSB
 > for the switch...
 > S Cook
 >

My switch does not have a brown ban all it has is a snowflake

Thanks<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 2000 Silverado AC 

nevlis wrote:

All I did was take two wires one from the positive side of the battery and one to the negative side and touched them to the two wire plug found at the top of my AC compressor... I believe one wire was black the other green. At that point the truck stalled. Thanks nevlis

Find you a friend or a trust worth mech that can work on A/C's and do not waste time (or money) with diagnosis and have them replace the compressor, the expansion valve/orifice (because it has a screen that can be trashed full from a compressor failure) and the receiver/dryer assembly (because you should always replace them with a compressor change). Add correct amount of oil (parts will come with instructions to the effect for mechs) and vacum down system and install R134a and you should be as good as new.
 >> Stay informed about: 2000 Silverado AC