99 Jeep Cherokee volts problem

when I turn on Defroster on volts drop and belt makes noise dont know
if it is the Alternator or AC or the also does it at start up

There is only one belt. What kind of shape is it in?


> wrote in message
ups.com...
> when I turn on Defroster on volts drop and belt makes noise dont know
> if it is the Alternator or AC or the also does it at start up
>

good just had it replaced
billy ray wrote:
> There is only one belt. What kind of shape is it in?
>
>
> > wrote in message
> ups.com...
> > when I turn on Defroster on volts drop and belt makes noise dont know
> > if it is the Alternator or AC or the also does it at start up
> >

That means the belt is loose or shined up.

It takes several horsepower to spin up an alternator under load and both
things you mention are just that.

The belt can be tight enough and just be polished up so it doesn't grab
anymore. That happens to me when I take my Jeep out to play in the mud
puddles. Mud is liquid sandpaper...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

wrote:
>
> when I turn on Defroster on volts drop and belt makes noise dont know
> if it is the Alternator or AC or the also does it at start up

belt is tight and not shined up it only doest it when AC or The
Defroster is on or when cold out and starts up or i turn all the lights
on rear defroster
Mike Romain wrote:
> That means the belt is loose or shined up.
>
> It takes several horsepower to spin up an alternator under load and both
> things you mention are just that.
>
> The belt can be tight enough and just be polished up so it doesn't grab
> anymore. That happens to me when I take my Jeep out to play in the mud
> puddles. Mud is liquid sandpaper...
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> wrote:
> >
> > when I turn on Defroster on volts drop and belt makes noise dont know
> > if it is the Alternator or AC or the also does it at start up

Belt is loose or shined up....

They go loose when new especially....

Take the cold off engine and try to see if you can grab and spin the
alternator pulley by hand. If you can, see above...

Mike

wrote:
>
> belt is tight and not shined up it only doest it when AC or The
> Defroster is on or when cold out and starts up or i turn all the lights
> on rear defroster
> Mike Romain wrote:
> > That means the belt is loose or shined up.
> >
> > It takes several horsepower to spin up an alternator under load and both
> > things you mention are just that.
> >
> > The belt can be tight enough and just be polished up so it doesn't grab
> > anymore. That happens to me when I take my Jeep out to play in the mud
> > puddles. Mud is liquid sandpaper...
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> > (More Off Road album links at bottom of the view page)
> >
> > wrote:
> > >
> > > when I turn on Defroster on volts drop and belt makes noise dont know
> > > if it is the Alternator or AC or the also does it at start up

wrote:

> when I turn on Defroster on volts drop and belt makes noise dont know
> if it is the Alternator or AC or the also does it at start up

1. Voltage drop is likely due to compressor clutch engagement. This is
normal. If the voltage drop is excessive, the charging system and/or
battery should be inspected for proper operation.

2. When the weather is cold and damp, even tightened belts can slip if
not tensioned properly. This slippage will often cause a squealing
noise, usually until it spins enough to dry out. Recheck the tension.
Cheap belts often make noise regardless of tension: install an OEM belt
if in doubt. (Goodyear Gaterback belts have always worked very well for
me as well.)

I'll second the Gatorback reccomendation. It's $34 if you go through
partsamerica.com and pick it up at your local Checker/Schucks/Kragen store.
Pull the belt and check the pulleys, make sure the tensioner is tight.

Carl


"Outatime" > wrote in message
...
> wrote:
>
>> when I turn on Defroster on volts drop and belt makes noise dont know
>> if it is the Alternator or AC or the also does it at start up
>
> 1. Voltage drop is likely due to compressor clutch engagement. This is
> normal. If the voltage drop is excessive, the charging system and/or
> battery should be inspected for proper operation.
>
> 2. When the weather is cold and damp, even tightened belts can slip if not
> tensioned properly. This slippage will often cause a squealing noise,
> usually until it spins enough to dry out. Recheck the tension. Cheap
> belts often make noise regardless of tension: install an OEM belt if in
> doubt. (Goodyear Gaterback belts have always worked very well for me as
> well.)
>

You might also want to get a check done of the charging system. Most auto
parts stores offer then for free.

The only requirement is a fully charged battery..


"Carl" > wrote in message
. ..
> I'll second the Gatorback reccomendation. It's $34 if you go through
> partsamerica.com and pick it up at your local Checker/Schucks/Kragen
> store. Pull the belt and check the pulleys, make sure the tensioner is
> tight.
>
> Carl
>
>
> "Outatime" > wrote in message
> ...
>> wrote:
>>
>>> when I turn on Defroster on volts drop and belt makes noise dont know
>>> if it is the Alternator or AC or the also does it at start up
>>
>> 1. Voltage drop is likely due to compressor clutch engagement. This is
>> normal. If the voltage drop is excessive, the charging system and/or
>> battery should be inspected for proper operation.
>>
>> 2. When the weather is cold and damp, even tightened belts can slip if
>> not tensioned properly. This slippage will often cause a squealing
>> noise, usually until it spins enough to dry out. Recheck the tension.
>> Cheap belts often make noise regardless of tension: install an OEM belt
>> if in doubt. (Goodyear Gaterback belts have always worked very well for
>> me as well.)
>>
>
>

Buy a Gates belt.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

wrote:
>
> good just had it replaced