I would appreciate any help or advise that anyone could give me to fix this
problem I'm having with my 89 Cherokee. My blower fan works on High speed
only and not at all on the lower speeds. Would this mean my switch is "bad"
or the resistor needsreplacing? Is there any way to fix/clean the switch
short of replacing it?

Thanks.

--
Gary B.

 

That is a cooked resistor pack.

It is located under a plastic cover down by the passenger's feet. Just
follow the 3 or 4 wires running there, they will lead to it.

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

"Gary B." wrote:
>
> I would appreciate any help or advise that anyone could give me to fix this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is "bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?
>
> Thanks.
>
> --
> Gary B.

 

That is a cooked resistor pack.

It is located under a plastic cover down by the passenger's feet. Just
follow the 3 or 4 wires running there, they will lead to it.

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

"Gary B." wrote:
>
> I would appreciate any help or advise that anyone could give me to fix this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is "bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?
>
> Thanks.
>
> --
> Gary B.

 

I had the same problem on my 96 cherokee took it to the dealer while it was
still under warranty and they replaced the switch. But theres probably a
difference between the 89 and 96 Cherokees.

Good Luck,

"Gary B." <jeepnmon@cinci.rr.com> wrote in message
news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> I would appreciate any help or advise that anyone could give me to fix
this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is
"bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?
>
> Thanks.
>
> --
> Gary B.
>
>


---
Outgoing mail is certified Virus Free.
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I had the same problem on my 96 cherokee took it to the dealer while it was
still under warranty and they replaced the switch. But theres probably a
difference between the 89 and 96 Cherokees.

Good Luck,

"Gary B." <jeepnmon@cinci.rr.com> wrote in message
news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> I would appreciate any help or advise that anyone could give me to fix
this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is
"bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?
>
> Thanks.
>
> --
> Gary B.
>
>


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 9/1/2003

 

"Gary B." <jeepnmon@cinci.rr.com> wrote in message
news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> I would appreciate any help or advise that anyone could give me to fix
this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is
"bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?

Could be switch or resistor pack... you'll have to troubleshoot
it. Easiest would be to pull the resistor pack and examine it...
basically pieces of coiled nichrome wire. The wire should be
solid; you should get low ohms with an ohmmeter check.

Some resistor packs have a temperature limiting fuse,
if the pack gets too hot, the fuse opens and voila,
you need a new pack. Bypassing the fuse to
repair the pack is not for the faint of heart.
__
Steve
..

 

"Gary B." <jeepnmon@cinci.rr.com> wrote in message
news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> I would appreciate any help or advise that anyone could give me to fix
this
> problem I'm having with my 89 Cherokee. My blower fan works on High speed
> only and not at all on the lower speeds. Would this mean my switch is
"bad"
> or the resistor needsreplacing? Is there any way to fix/clean the switch
> short of replacing it?

Could be switch or resistor pack... you'll have to troubleshoot
it. Easiest would be to pull the resistor pack and examine it...
basically pieces of coiled nichrome wire. The wire should be
solid; you should get low ohms with an ohmmeter check.

Some resistor packs have a temperature limiting fuse,
if the pack gets too hot, the fuse opens and voila,
you need a new pack. Bypassing the fuse to
repair the pack is not for the faint of heart.
__
Steve
..

 

Well, I found the problem. It was the resistor pack. Got one from the
dealer today for $17 and some change. Installed it and voila, I have a
multi-speed blower once again! Awesome!
Thank you so much for your help with this!

Regards,
Gary B.


" Stephen Cowell" <scowell@sbcglobal.net> wrote in message
news:VM0bb.1320$Q63.249@newssvr23.news.prodigy.com ...
>
> "Gary B." <jeepnmon@cinci.rr.com> wrote in message
> news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> > I would appreciate any help or advise that anyone could give me to fix
> this
> > problem I'm having with my 89 Cherokee. My blower fan works on High
speed
> > only and not at all on the lower speeds. Would this mean my switch is
> "bad"
> > or the resistor needsreplacing? Is there any way to fix/clean the
switch
> > short of replacing it?
>
> Could be switch or resistor pack... you'll have to troubleshoot
> it. Easiest would be to pull the resistor pack and examine it...
> basically pieces of coiled nichrome wire. The wire should be
> solid; you should get low ohms with an ohmmeter check.
>
> Some resistor packs have a temperature limiting fuse,
> if the pack gets too hot, the fuse opens and voila,
> you need a new pack. Bypassing the fuse to
> repair the pack is not for the faint of heart.
> __
> Steve
> .
>
>

 

Well, I found the problem. It was the resistor pack. Got one from the
dealer today for $17 and some change. Installed it and voila, I have a
multi-speed blower once again! Awesome!
Thank you so much for your help with this!

Regards,
Gary B.


" Stephen Cowell" <scowell@sbcglobal.net> wrote in message
news:VM0bb.1320$Q63.249@newssvr23.news.prodigy.com ...
>
> "Gary B." <jeepnmon@cinci.rr.com> wrote in message
> news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> > I would appreciate any help or advise that anyone could give me to fix
> this
> > problem I'm having with my 89 Cherokee. My blower fan works on High
speed
> > only and not at all on the lower speeds. Would this mean my switch is
> "bad"
> > or the resistor needsreplacing? Is there any way to fix/clean the
switch
> > short of replacing it?
>
> Could be switch or resistor pack... you'll have to troubleshoot
> it. Easiest would be to pull the resistor pack and examine it...
> basically pieces of coiled nichrome wire. The wire should be
> solid; you should get low ohms with an ohmmeter check.
>
> Some resistor packs have a temperature limiting fuse,
> if the pack gets too hot, the fuse opens and voila,
> you need a new pack. Bypassing the fuse to
> repair the pack is not for the faint of heart.
> __
> Steve
> .
>
>

 

I think if you run the heater on recirculating air too long, it can
overheat the system, but you could have a good point about an old motor
starting to draw too much.

Our motor went that way and killed the switch. It melted it down.
Resistor pack stayed ok.

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

Dave wrote:
>
> I always wonder why the resistor pack blows that thermo fuse???
> I was told it is caused by a blower that demands a little too much current.
> :-(
>
> Keep your old pack and install a new fuse in it. I believe that Radio Shack
> may sell them cheaply.
> later,
> dave
>
> "Gary B." <jeepnmon@cinci.rr.com> wrote in message
> news:Rbcbb.10121$KJ5.251@fe2.columbus.rr.com...
> > Well, I found the problem. It was the resistor pack. Got one from the
> > dealer today for $17 and some change. Installed it and voila, I have a
> > multi-speed blower once again! Awesome!
> > Thank you so much for your help with this!
> >
> > Regards,
> > Gary B.
> >
> >
> > " Stephen Cowell" <scowell@sbcglobal.net> wrote in message
> > news:VM0bb.1320$Q63.249@newssvr23.news.prodigy.com ...
> > >
> > > "Gary B." <jeepnmon@cinci.rr.com> wrote in message
> > > news:umZab.15408$uJ2.8084@fe3.columbus.rr.com...
> > > > I would appreciate any help or advise that anyone could give me to fix
> > > this
> > > > problem I'm having with my 89 Cherokee. My blower fan works on High
> > speed
> > > > only and not at all on the lower speeds. Would this mean my switch is
> > > "bad"
> > > > or the resistor needsreplacing? Is there any way to fix/clean the
> > switch
> > > > short of replacing it?
> > >
> > > Could be switch or resistor pack... you'll have to troubleshoot
> > > it. Easiest would be to pull the resistor pack and examine it...
> > > basically pieces of coiled nichrome wire. The wire should be
> > > solid; you should get low ohms with an ohmmeter check.
> > >
> > > Some resistor packs have a temperature limiting fuse,
> > > if the pack gets too hot, the fuse opens and voila,
> > > you need a new pack. Bypassing the fuse to
> > > repair the pack is not for the faint of heart.
> > > __
> > > Steve
> > > .
> > >
> > >
> >
> >