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Old 03-24-2006, 09:37 AM   #1
entheos
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Question fan relay location

I have done a search and seen pictures of the location of the fan relay on non 99 saturn's fan relay location, but my 1999 SC2 does not label the relays in the engine compartment fuse box, nor is there a picture in the owners manual or the Haynes service manual of the location of the relays. I would like to change the relay out as it may be the cause of an engine that barely makes the temp guage go above the 'C' (new thermostat) and the service wrench comes on from time to time. Any help would be appreciated.

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Old 03-24-2006, 09:50 AM   #2
Low Saturn
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Default Re: fan relay location

Is the fan on all the time? If not, then its probable not the fan relay. Have your codes checked before you start unecessary repairs and spending money on parts. The code should tell you the source of your problem.

But at first guess, judging by your symptoms, Id say ECTS (Engine Coolant Temperature Sensor).

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Old 03-24-2006, 10:19 AM   #3
mohave
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Default Re: fan relay location

Are you saying that you put in a new thermostat or are you wondering if it is the thermostat?

I would be looking at the thermostat with your symptoms since it may not be closing, which will prevent the car from warming up. This seems to be a common problem on the Saturn. Is the radiator getting good and hot? Is the heater coming up to temperature quickly? If they are, then the ECTS sensor may be telling you the engine is cold when it is not. If the thermostat is sticking open, then the radiator will not get as hot as it should, the heater may take five or more minutes to get good hot air coming out, and the sensor is giving you a proper reading of an engine that is not coming up to temperature the way it should.

If it were me, and it was just last year, I would replace the thermostat, the ECTS sensor, and both radiator hoses. Then put the proper coolent in the engine and I suspect things will be better. Just my humble opinion.

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Old 03-24-2006, 06:55 PM   #4
entheos
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Default Re: fan relay location

Thanks for the quick replies, I have replaced the ECTS and I just bought an IAS for it. It gets good mileage (~33 in rural driving) and the heater output is good. I think I will heed your advice on the coolant flush / radiator hoses if and when the temperature here in Michigan ever hits 50 again!

I just thought that since a famous poster here has recommended replacing the fan relay if the service wrench light stays on, and it is (potentially) very easy & cheap to do, I would try it and cross that one off the list of things to do to my brand new used car (I've done a few other things like replace the muffler, plugs & wires) to get it working as good as it can. I just can't figure out which one of the relays under the hood do what and the darn owners manual fails to print a fuse schematic (it is a different kind of manual I guess) . They also ain't labled.

Would try pulling them until the fan stops turning work?

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Old 03-24-2006, 07:08 PM   #5
GreenSC2
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Default Re: fan relay location

Quote:
Originally Posted by entheos
I have done a search and seen pictures of the location of the fan relay on non 99 saturn's fan relay location, but my 1999 SC2 does not label the relays in the engine compartment fuse box, nor is there a picture in the owners manual or the Haynes service manual of the location of the relays. I would like to change the relay out as it may be the cause of an engine that barely makes the temp guage go above the 'C' (new thermostat) and the service wrench comes on from time to time. Any help would be appreciated.
Did you look on the inside of the fuse box COVER. Thats where the location is shown on my 2000 sc2.

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Old 03-24-2006, 07:09 PM   #6
Sky King
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Default Re: fan relay location

Quote:
Originally Posted by Low Saturn
Is the fan on all the time? If not, then its probable not the fan relay. Have your codes checked before you start unecessary repairs and spending money on parts. The code should tell you the source of your problem.

But at first guess, judging by your symptoms, Id say ECTS (Engine Coolant Temperature Sensor).
I'm with Low Saturn here. I would ask if the fan is on all the time. Also I have a 99 SC-2 and The items in the under hood relay/fuse panel are labled. The diagram is on the inside of the cover. Take the cover off and look at the inside. If you don't find it, they are, as you stand at the drivers side of the car, the relay closest to the front of the car is for the air pump if you have one. The next realy is for the fog lamps, next is the air conditioner and then the radiator cooling fan. The last one is for ABS. The fog lamp, air contidioner and fan relays are the same part number relays. You can pull one out and swap them for trouble shooting.

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