Electric Fan Motor
05-25-2004, 09:07 PM
#31
Guest
Posts: n/a
Re: Electric Fan Motor
40? I'm thinking you're talking about the 40 amp maxi fuses in the power
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
05-25-2004, 09:07 PM
#32
Guest
Posts: n/a
Re: Electric Fan Motor
40? I'm thinking you're talking about the 40 amp maxi fuses in the power
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
05-25-2004, 09:07 PM
#33
Guest
Posts: n/a
Re: Electric Fan Motor
40? I'm thinking you're talking about the 40 amp maxi fuses in the power
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
distribution center. If not, what is this 40 you refer to?
In message <B8Hsc.26419$fF3.679331@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
wrote:
>I switched the relay for the electric fan (40) with the ignition relay (also
>40).
>
>
>"bllsht" <nospam@invaliddot.net> wrote in message
>news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com.. .
>> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>,
>"Tom R"
>> wrote:
>>
>> >I already tested the fan & relay, they both are OK. I switched out the
>> >Coolant Temperature Sensor today and still no luck.
>>
>> The fan staying on before total failure sure sounds like a relay problem
>to me.
>> How did you test it?
>>
>> If the old fan motor was so worn that it was running slow, it probably
>smoked
>> the relay.
>>
>> >
>> >Now I am wondering now if it could be the thermostat. I know the CTS is
>in
>> >the same housing as the thermostat, but is it upstream of the thermostat?
>> >
>> >Tom R.
>> >
>> >"Snow" <snowball_2004@msn.com> wrote in message
>> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
>> >> Well assuming its the same layout as my 4.0 , the electric fan gets
>its
>> >> signal from the temp sensor on the thermostat housing, the gauge gets
>its
>> >> signal from a sending unit on the after left hand side of the engine.
>the
>> >> gauge and fan don't share the sensor/sending units. Sounds to me
>like
>> >> either your temp sensor (on the t-stat housing) or the relay for it has
>> >bit
>> >> the dust. Eliminate the fan by connecting it directly to the battery,
>if
>> >it
>> >> spins then you know its good.
>> >>
>> >> Snow... "Don Cherry for Prime Minister"
>> >>
>> >>
>> >> "Tom R" <tomr@noreply.com> wrote in message
>> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
>> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going
>through
>> >a
>> >> > slow death (decreasing RPM's) so I recently replaced.
>> >> >
>> >> > The new fan worked fine for several days then it ran constantly after
>> >the
>> >> > engine was shut off. For several days I just unplugged the fan so it
>> >would
>> >> > not drain my battery. Now when I plug it back in, it does not work at
>> >all,
>> >> > even when the temperature guage reads 210+.
>> >> >
>> >> > The temperature guage, thermostat and relay appear to working
>correctly.
>> >> >
>> >> > Does the electric fan take its signal from the temperature sensor at
>the
>> >> > thermostat or is there another sensor that could be causing the
>problem?
>> >> >
>> >> > Any suggestions?
>> >> >
>> >> > - Tom R
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>
05-26-2004, 09:53 PM
#34
Guest
Posts: n/a
Re: Electric Fan Motor
pull fault codes
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
05-26-2004, 09:53 PM
#35
Guest
Posts: n/a
Re: Electric Fan Motor
pull fault codes
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
05-26-2004, 09:53 PM
#36
Guest
Posts: n/a
Re: Electric Fan Motor
pull fault codes
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
05-26-2004, 09:53 PM
#37
Guest
Posts: n/a
Re: Electric Fan Motor
pull fault codes
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
Tom R wrote:
> 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through a
> slow death (decreasing RPM's) so I recently replaced.
>
> The new fan worked fine for several days then it ran constantly after the
> engine was shut off. For several days I just unplugged the fan so it would
> not drain my battery. Now when I plug it back in, it does not work at all,
> even when the temperature guage reads 210+.
>
> The temperature guage, thermostat and relay appear to working correctly.
>
> Does the electric fan take its signal from the temperature sensor at the
> thermostat or is there another sensor that could be causing the problem?
>
> Any suggestions?
>
> - Tom R
05-26-2004, 09:57 PM
#38
Guest
Posts: n/a
Re: Electric Fan Motor
the fan control relay is behingd the right headlite assembly, is that the one you
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
05-26-2004, 09:57 PM
#39
Guest
Posts: n/a
Re: Electric Fan Motor
the fan control relay is behingd the right headlite assembly, is that the one you
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
05-26-2004, 09:57 PM
#40
Guest
Posts: n/a
Re: Electric Fan Motor
the fan control relay is behingd the right headlite assembly, is that the one you
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
tested????
bllsht wrote:
> In message <Gctsc.24027$fF3.612160@bgtnsc05-news.ops.worldnet.att.net>, "Tom R"
> wrote:
>
> >I already tested the fan & relay, they both are OK. I switched out the
> >Coolant Temperature Sensor today and still no luck.
>
> The fan staying on before total failure sure sounds like a relay problem to me.
> How did you test it?
>
> If the old fan motor was so worn that it was running slow, it probably smoked
> the relay.
>
> >
> >Now I am wondering now if it could be the thermostat. I know the CTS is in
> >the same housing as the thermostat, but is it upstream of the thermostat?
> >
> >Tom R.
> >
> >"Snow" <snowball_2004@msn.com> wrote in message
> >news:848sc.9996$sr3.117197@news20.bellglobal.com. ..
> >> Well assuming its the same layout as my 4.0 , the electric fan gets its
> >> signal from the temp sensor on the thermostat housing, the gauge gets its
> >> signal from a sending unit on the after left hand side of the engine. the
> >> gauge and fan don't share the sensor/sending units. Sounds to me like
> >> either your temp sensor (on the t-stat housing) or the relay for it has
> >bit
> >> the dust. Eliminate the fan by connecting it directly to the battery, if
> >it
> >> spins then you know its good.
> >>
> >> Snow... "Don Cherry for Prime Minister"
> >>
> >>
> >> "Tom R" <tomr@noreply.com> wrote in message
> >> news:ec6sc.19789$fF3.505534@bgtnsc05-news.ops.worldnet.att.net...
> >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through
> >a
> >> > slow death (decreasing RPM's) so I recently replaced.
> >> >
> >> > The new fan worked fine for several days then it ran constantly after
> >the
> >> > engine was shut off. For several days I just unplugged the fan so it
> >would
> >> > not drain my battery. Now when I plug it back in, it does not work at
> >all,
> >> > even when the temperature guage reads 210+.
> >> >
> >> > The temperature guage, thermostat and relay appear to working correctly.
> >> >
> >> > Does the electric fan take its signal from the temperature sensor at the
> >> > thermostat or is there another sensor that could be causing the problem?
> >> >
> >> > Any suggestions?
> >> >
> >> > - Tom R
> >> >
> >> >
> >> >
> >>
> >>
> >
> >