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Re: Electric Fan Motor
I already tested the fan & relay, they both are OK. I switched out the
Coolant Temperature Sensor today and still no luck. 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 > > > > > > > > |
Re: Electric Fan Motor
I already tested the fan & relay, they both are OK. I switched out the
Coolant Temperature Sensor today and still no luck. 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 > > > > > > > > |
Re: Electric Fan Motor
I already tested the fan & relay, they both are OK. I switched out the
Coolant Temperature Sensor today and still no luck. 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 > > > > > > > > |
Re: Electric Fan Motor
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$fF3.505534@bgtnsc05-news.ops.worldnet.att.net... >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through >a >> > slow death (decreasing RPM's) so I recently replaced. >> > >> > The new fan worked fine for several days then it ran constantly after >the >> > engine was shut off. For several days I just unplugged the fan so it >would >> > not drain my battery. Now when I plug it back in, it does not work at >all, >> > even when the temperature guage reads 210+. >> > >> > The temperature guage, thermostat and relay appear to working correctly. >> > >> > Does the electric fan take its signal from the temperature sensor at the >> > thermostat or is there another sensor that could be causing the problem? >> > >> > Any suggestions? >> > >> > - Tom R >> > >> > >> > >> >> > > |
Re: Electric Fan Motor
In message <Gctsc.24027$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 >> > >> > >> > >> >> > > |
Re: Electric Fan Motor
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$fF3.505534@bgtnsc05-news.ops.worldnet.att.net... >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through >a >> > slow death (decreasing RPM's) so I recently replaced. >> > >> > The new fan worked fine for several days then it ran constantly after >the >> > engine was shut off. For several days I just unplugged the fan so it >would >> > not drain my battery. Now when I plug it back in, it does not work at >all, >> > even when the temperature guage reads 210+. >> > >> > The temperature guage, thermostat and relay appear to working correctly. >> > >> > Does the electric fan take its signal from the temperature sensor at the >> > thermostat or is there another sensor that could be causing the problem? >> > >> > Any suggestions? >> > >> > - Tom R >> > >> > >> > >> >> > > |
Re: Electric Fan Motor
In message <Gctsc.24027$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 >> > >> > >> > >> >> > > |
Re: Electric Fan Motor
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$fF3.505534@bgtnsc05-news.ops.worldnet.att.net... > >> > 1999 Grand Cherokee w/ 4.0L. The electric cooling fan was going through > >a > >> > slow death (decreasing RPM's) so I recently replaced. > >> > > >> > The new fan worked fine for several days then it ran constantly after > >the > >> > engine was shut off. For several days I just unplugged the fan so it > >would > >> > not drain my battery. Now when I plug it back in, it does not work at > >all, > >> > even when the temperature guage reads 210+. > >> > > >> > The temperature guage, thermostat and relay appear to working correctly. > >> > > >> > Does the electric fan take its signal from the temperature sensor at the > >> > thermostat or is there another sensor that could be causing the problem? > >> > > >> > Any suggestions? > >> > > >> > - Tom R > >> > > >> > > >> > > >> > >> > > > > > |
Re: Electric Fan Motor
I switched the relay for the electric fan (40) with the ignition relay (also
40). "bllsht" <nospam@invaliddot.net> wrote in message news:29q5b09l80o8uit5gr9et3hr5fudnofp92@4ax.com... > In message <Gctsc.24027$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 > >> > > >> > > >> > > >> > >> > > > > > |
Re: Electric Fan Motor
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 > >> > > >> > > >> > > >> > >> > > > > > |
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