90 XJ AC and dash lights
 

My dash lights blew the fuse when I replaced the blown fuse already in
there, has anyone already chased down a problem like this before? I could
use some pointers since I've never chased down an electrical problem like
this before.

Also now, my air blower motor makes a whining noise when I turn it on, but
disappears after a few seconds... I'm guessing it hasn't been used much
since the AC went out altogether. I may take it out and wd40 it down but
the AC compressor's cluth doesn't engage when I turn on the ac.

I've heard it could be a diode on the compressor, the ac clutch relay, or
lastly the electronic control unit? I'm guessing the ecu is the computer,
and nothing else is wrong with the jeep so how do I check the diode again?
I have a multitester. Where is the diode? Or do I just replace the
compressor? Where is this clutch relay so I can test that? Or somebody
know what I should do/try? Thanks in advance!

Troy

Re: 90 XJ AC and dash lights
 

Don't put WD40 on the blower motor, unless you want to fry the bushings. It
is too thin for that application. Several companies make oil for electric
motors, and you can always use a drop of engine oil as a substitute.

You probably have low refrigerant, and a refrigerant leak that should be
fixed.

Earle

"Troy" <@ .> wrote in message news:feadnYk8Rui38vbZRVn-iw@comcast.com...
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy
>
>

Re: 90 XJ AC and dash lights
 

Don't put WD40 on the blower motor, unless you want to fry the bushings. It
is too thin for that application. Several companies make oil for electric
motors, and you can always use a drop of engine oil as a substitute.

You probably have low refrigerant, and a refrigerant leak that should be
fixed.

Earle

"Troy" <@ .> wrote in message news:feadnYk8Rui38vbZRVn-iw@comcast.com...
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy
>
>

Re: 90 XJ AC and dash lights
 

Don't put WD40 on the blower motor, unless you want to fry the bushings. It
is too thin for that application. Several companies make oil for electric
motors, and you can always use a drop of engine oil as a substitute.

You probably have low refrigerant, and a refrigerant leak that should be
fixed.

Earle

"Troy" <@ .> wrote in message news:feadnYk8Rui38vbZRVn-iw@comcast.com...
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy
>
>

Re: 90 XJ AC and dash lights
 

Hi Troy,
Diodes are a part of the alternator circuitry.
Like Earle said the low refrigerant pressure switch has turn off
the compressor's clutch:
http://members.cox.net/wilsond/Fixes...s.html#sensors
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Troy wrote:
>
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy

Re: 90 XJ AC and dash lights
 

Hi Troy,
Diodes are a part of the alternator circuitry.
Like Earle said the low refrigerant pressure switch has turn off
the compressor's clutch:
http://members.cox.net/wilsond/Fixes...s.html#sensors
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Troy wrote:
>
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy

Re: 90 XJ AC and dash lights
 

Hi Troy,
Diodes are a part of the alternator circuitry.
Like Earle said the low refrigerant pressure switch has turn off
the compressor's clutch:
http://members.cox.net/wilsond/Fixes...s.html#sensors
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Troy wrote:
>
> My dash lights blew the fuse when I replaced the blown fuse already in
> there, has anyone already chased down a problem like this before? I could
> use some pointers since I've never chased down an electrical problem like
> this before.
>
> Also now, my air blower motor makes a whining noise when I turn it on, but
> disappears after a few seconds... I'm guessing it hasn't been used much
> since the AC went out altogether. I may take it out and wd40 it down but
> the AC compressor's cluth doesn't engage when I turn on the ac.
>
> I've heard it could be a diode on the compressor, the ac clutch relay, or
> lastly the electronic control unit? I'm guessing the ecu is the computer,
> and nothing else is wrong with the jeep so how do I check the diode again?
> I have a multitester. Where is the diode? Or do I just replace the
> compressor? Where is this clutch relay so I can test that? Or somebody
> know what I should do/try? Thanks in advance!
>
> Troy

Re: 90 XJ AC and dash lights
 

Ah thank you Earle and Bill for that info. I have access to an ac pressure
gauge thingy, lol whatever its called wow i sound like a newbie. So I'm
guessing that it wont just leak out after 16 years and that it obviously has
to have a leak somewhere? My next question is, using the gauge I have, if
the pressure is low like it sounds then how do I go about finding this leak?
I'm probably better off having a shop check it out aren't I? I wonder how
much that's gonna cost. Do they even sell Freon anymore or IF i take it to
a shop are they going to make me upgrade the system to the r134a? Man this
is starting to sound expensive.

Troy

Re: 90 XJ AC and dash lights
 

Ah thank you Earle and Bill for that info. I have access to an ac pressure
gauge thingy, lol whatever its called wow i sound like a newbie. So I'm
guessing that it wont just leak out after 16 years and that it obviously has
to have a leak somewhere? My next question is, using the gauge I have, if
the pressure is low like it sounds then how do I go about finding this leak?
I'm probably better off having a shop check it out aren't I? I wonder how
much that's gonna cost. Do they even sell Freon anymore or IF i take it to
a shop are they going to make me upgrade the system to the r134a? Man this
is starting to sound expensive.

Troy

Re: 90 XJ AC and dash lights
 

Ah thank you Earle and Bill for that info. I have access to an ac pressure
gauge thingy, lol whatever its called wow i sound like a newbie. So I'm
guessing that it wont just leak out after 16 years and that it obviously has
to have a leak somewhere? My next question is, using the gauge I have, if
the pressure is low like it sounds then how do I go about finding this leak?
I'm probably better off having a shop check it out aren't I? I wonder how
much that's gonna cost. Do they even sell Freon anymore or IF i take it to
a shop are they going to make me upgrade the system to the r134a? Man this
is starting to sound expensive.

Troy