Re: A/C CLUTCH SOLENOID
 

I did
Just trying to figure out how the solenoid energizes when the key is
removed.

--

Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"DougW" <post.replies@invalid.address> wrote in message
news:5kbge.8223$Ri4.8161@okepread07...
> JEEPR did pass the time by typing:
> > OK done some reverse engineering
>
> Did you read the schematic I posted a link to?
>
> The relay is supplied 12V from the battery through a fuse
> to the relay coil. The relay coil then gets it's ground
> through the computer. That clicks the relay.
>
> The 12V supply to the clutch runs across the high and
> low pressure safety switches to the relay (switch side)
> and then to the clutch.
>
> Your basic relay:
> http://www.revbeergoggles.com/temp/relay.jpg
> Your basic relays schematic:
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
>
> --
> DougW
>
>
>

Re: A/C CLUTCH SOLENOID
 

I did
Just trying to figure out how the solenoid energizes when the key is
removed.

--

Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"DougW" <post.replies@invalid.address> wrote in message
news:5kbge.8223$Ri4.8161@okepread07...
> JEEPR did pass the time by typing:
> > OK done some reverse engineering
>
> Did you read the schematic I posted a link to?
>
> The relay is supplied 12V from the battery through a fuse
> to the relay coil. The relay coil then gets it's ground
> through the computer. That clicks the relay.
>
> The 12V supply to the clutch runs across the high and
> low pressure safety switches to the relay (switch side)
> and then to the clutch.
>
> Your basic relay:
> http://www.revbeergoggles.com/temp/relay.jpg
> Your basic relays schematic:
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
>
> --
> DougW
>
>
>

Re: A/C CLUTCH SOLENOID
 

I did
Just trying to figure out how the solenoid energizes when the key is
removed.

--

Matt
0|||||||0
Tact is the ability to describe others as they see themselves
"DougW" <post.replies@invalid.address> wrote in message
news:5kbge.8223$Ri4.8161@okepread07...
> JEEPR did pass the time by typing:
> > OK done some reverse engineering
>
> Did you read the schematic I posted a link to?
>
> The relay is supplied 12V from the battery through a fuse
> to the relay coil. The relay coil then gets it's ground
> through the computer. That clicks the relay.
>
> The 12V supply to the clutch runs across the high and
> low pressure safety switches to the relay (switch side)
> and then to the clutch.
>
> Your basic relay:
> http://www.revbeergoggles.com/temp/relay.jpg
> Your basic relays schematic:
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
>
> --
> DougW
>
>
>

Re: A/C CLUTCH SOLENOID
 

OK, but we use terms like ground or power to identify the wires
like in this basic KC relay wiring:
http://www.kchilites.com/instruction...layHarness.pdf Like nothing
says "common" in these diagrams: http://www.----------.com/ACWire.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

JEEPR wrote:
>
> take a look at Doug's schematic at
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
> 30 being the common terminal, 87a being normally closed and 87 being
> normally open, that how we phrase it in the aviation industry
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:42813B52.8D1FE10@cox.net...
> > Your use of the word common confuses me, as it is the term we use
> > for the white wire in out homes which is grounded, just like the bare
> > copper wire is.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > JEEPR wrote:
> > >
> > > OK done some reverse engineering
> > > the coil of the relay has a switched controlled ground and a 12v power
> > > supply controlled through ignition sw I guessing as the 12v is not
> constant
> > > the common contact on the relay has a constant 12v.
> > > for the clutch solenoid to energize with ignition off, a ground would
> have
> > > to be supplied to the relay and also a power source to energize the
> relay.
> > > So theoretically if the ignition switch was not shutting off all the way
> > > when key is extracted and the control was left on defrost this would
> cause
> > > the problem as I had described. Not sure were the low pressure sw.
> plays in
> > > this theory though, is it ignition controlled?
> > > But I recall the solenoid engaging with the heater in off selection I'm
> > > pretty sure.
> > > If the PCM was having a melt down you think I would notice more symptoms
> on
> > > other systems.
> > > Ok I think I just talked myself out of understanding what the hell is
> going
> > > on.
> > >
> > > x1=12v sw
> > > x2= gnd sw
> > > C= common 12v constant
> > > nc= normally closed to common
> > > no= normally open or closed to common when relay is energized
> > > | or __ = contacts
> > >
> > > -- | x2 | nc | x1
> > >
> > > __no
> > >
> > > __C

Re: A/C CLUTCH SOLENOID
 

OK, but we use terms like ground or power to identify the wires
like in this basic KC relay wiring:
http://www.kchilites.com/instruction...layHarness.pdf Like nothing
says "common" in these diagrams: http://www.----------.com/ACWire.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

JEEPR wrote:
>
> take a look at Doug's schematic at
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
> 30 being the common terminal, 87a being normally closed and 87 being
> normally open, that how we phrase it in the aviation industry
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:42813B52.8D1FE10@cox.net...
> > Your use of the word common confuses me, as it is the term we use
> > for the white wire in out homes which is grounded, just like the bare
> > copper wire is.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > JEEPR wrote:
> > >
> > > OK done some reverse engineering
> > > the coil of the relay has a switched controlled ground and a 12v power
> > > supply controlled through ignition sw I guessing as the 12v is not
> constant
> > > the common contact on the relay has a constant 12v.
> > > for the clutch solenoid to energize with ignition off, a ground would
> have
> > > to be supplied to the relay and also a power source to energize the
> relay.
> > > So theoretically if the ignition switch was not shutting off all the way
> > > when key is extracted and the control was left on defrost this would
> cause
> > > the problem as I had described. Not sure were the low pressure sw.
> plays in
> > > this theory though, is it ignition controlled?
> > > But I recall the solenoid engaging with the heater in off selection I'm
> > > pretty sure.
> > > If the PCM was having a melt down you think I would notice more symptoms
> on
> > > other systems.
> > > Ok I think I just talked myself out of understanding what the hell is
> going
> > > on.
> > >
> > > x1=12v sw
> > > x2= gnd sw
> > > C= common 12v constant
> > > nc= normally closed to common
> > > no= normally open or closed to common when relay is energized
> > > | or __ = contacts
> > >
> > > -- | x2 | nc | x1
> > >
> > > __no
> > >
> > > __C

Re: A/C CLUTCH SOLENOID
 

OK, but we use terms like ground or power to identify the wires
like in this basic KC relay wiring:
http://www.kchilites.com/instruction...layHarness.pdf Like nothing
says "common" in these diagrams: http://www.----------.com/ACWire.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

JEEPR wrote:
>
> take a look at Doug's schematic at
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
> 30 being the common terminal, 87a being normally closed and 87 being
> normally open, that how we phrase it in the aviation industry
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:42813B52.8D1FE10@cox.net...
> > Your use of the word common confuses me, as it is the term we use
> > for the white wire in out homes which is grounded, just like the bare
> > copper wire is.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > JEEPR wrote:
> > >
> > > OK done some reverse engineering
> > > the coil of the relay has a switched controlled ground and a 12v power
> > > supply controlled through ignition sw I guessing as the 12v is not
> constant
> > > the common contact on the relay has a constant 12v.
> > > for the clutch solenoid to energize with ignition off, a ground would
> have
> > > to be supplied to the relay and also a power source to energize the
> relay.
> > > So theoretically if the ignition switch was not shutting off all the way
> > > when key is extracted and the control was left on defrost this would
> cause
> > > the problem as I had described. Not sure were the low pressure sw.
> plays in
> > > this theory though, is it ignition controlled?
> > > But I recall the solenoid engaging with the heater in off selection I'm
> > > pretty sure.
> > > If the PCM was having a melt down you think I would notice more symptoms
> on
> > > other systems.
> > > Ok I think I just talked myself out of understanding what the hell is
> going
> > > on.
> > >
> > > x1=12v sw
> > > x2= gnd sw
> > > C= common 12v constant
> > > nc= normally closed to common
> > > no= normally open or closed to common when relay is energized
> > > | or __ = contacts
> > >
> > > -- | x2 | nc | x1
> > >
> > > __no
> > >
> > > __C

Re: A/C CLUTCH SOLENOID
 

OK, but we use terms like ground or power to identify the wires
like in this basic KC relay wiring:
http://www.kchilites.com/instruction...layHarness.pdf Like nothing
says "common" in these diagrams: http://www.----------.com/ACWire.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

JEEPR wrote:
>
> take a look at Doug's schematic at
> http://www.revbeergoggles.com/temp/relay-diagram.jpg
> 30 being the common terminal, 87a being normally closed and 87 being
> normally open, that how we phrase it in the aviation industry
>
> --
>
> Matt
> 0|||||||0
> Tact is the ability to describe others as they see themselves
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:42813B52.8D1FE10@cox.net...
> > Your use of the word common confuses me, as it is the term we use
> > for the white wire in out homes which is grounded, just like the bare
> > copper wire is.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > JEEPR wrote:
> > >
> > > OK done some reverse engineering
> > > the coil of the relay has a switched controlled ground and a 12v power
> > > supply controlled through ignition sw I guessing as the 12v is not
> constant
> > > the common contact on the relay has a constant 12v.
> > > for the clutch solenoid to energize with ignition off, a ground would
> have
> > > to be supplied to the relay and also a power source to energize the
> relay.
> > > So theoretically if the ignition switch was not shutting off all the way
> > > when key is extracted and the control was left on defrost this would
> cause
> > > the problem as I had described. Not sure were the low pressure sw.
> plays in
> > > this theory though, is it ignition controlled?
> > > But I recall the solenoid engaging with the heater in off selection I'm
> > > pretty sure.
> > > If the PCM was having a melt down you think I would notice more symptoms
> on
> > > other systems.
> > > Ok I think I just talked myself out of understanding what the hell is
> going
> > > on.
> > >
> > > x1=12v sw
> > > x2= gnd sw
> > > C= common 12v constant
> > > nc= normally closed to common
> > > no= normally open or closed to common when relay is energized
> > > | or __ = contacts
> > >
> > > -- | x2 | nc | x1
> > >
> > > __no
> > >
> > > __C

Re: A/C CLUTCH SOLENOID
 

JEEPR wrote:
>

> But I recall the solenoid engaging with the heater in off selection I'm
> pretty sure.


You really should make sure one way or the other.

Do you already have a rotted ground strap from the rear of the engine
head to the firewall? If this ground is bad, you also will get a dead
battery. Seeing as you post from sympatico, you are in the rust belt
and that strap does rot out. There is another computer harness ground
on a bolt at the rear passenger side of the engine with a mess of small
wires on it.

If the computer is seeking a ground for it's 'holding' power, it could
maybe be stealing it through that relay which keeps the thing activated.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Re: A/C CLUTCH SOLENOID
 

JEEPR wrote:
>

> But I recall the solenoid engaging with the heater in off selection I'm
> pretty sure.


You really should make sure one way or the other.

Do you already have a rotted ground strap from the rear of the engine
head to the firewall? If this ground is bad, you also will get a dead
battery. Seeing as you post from sympatico, you are in the rust belt
and that strap does rot out. There is another computer harness ground
on a bolt at the rear passenger side of the engine with a mess of small
wires on it.

If the computer is seeking a ground for it's 'holding' power, it could
maybe be stealing it through that relay which keeps the thing activated.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Re: A/C CLUTCH SOLENOID
 

JEEPR wrote:
>

> But I recall the solenoid engaging with the heater in off selection I'm
> pretty sure.


You really should make sure one way or the other.

Do you already have a rotted ground strap from the rear of the engine
head to the firewall? If this ground is bad, you also will get a dead
battery. Seeing as you post from sympatico, you are in the rust belt
and that strap does rot out. There is another computer harness ground
on a bolt at the rear passenger side of the engine with a mess of small
wires on it.

If the computer is seeking a ground for it's 'holding' power, it could
maybe be stealing it through that relay which keeps the thing activated.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's