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Old 09-04-2010, 11:58 AM   #1
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Default Radiator Fans-One not working

I have a 2000 SSEi and only one fan turns on when the car is hot. If I am not moving the car will get hot during 100 degree days and the warning light has come on a few times, but once I get moving the temp will down to 200.

Do I have a relay issue or is the fan broken?

I have 146K on the car.

Thanks for the help.
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Old 09-04-2010, 01:10 PM   #2
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Check the fuse and the relay in the under hood fuse block.
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Old 09-05-2010, 05:24 PM   #3
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Keep in mind the fans do not come on at the same time. IIRC your secondary fan won't kick in until 235ish if all conditions are met. You may have a problem other than the fans.
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Old 09-05-2010, 05:30 PM   #4
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I would get a 180* Thermostat
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Old 09-05-2010, 05:32 PM   #5
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In order for a 180* thermostat to be effective you need to also need to have your fans reprogrammed.
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Old 09-05-2010, 05:34 PM   #6
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how do u go about doing that? Do you have to do that on the 1992-1999 Bonnevilles Also?
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Old 09-05-2010, 05:40 PM   #7
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The setting has to be changed in the PCM with a tuner. That applies to the pre 2000 bonnevilles as well. The 180* thermostat will have the coolant flowing, but without adjusting the fans they will not come on which means unless your driving you have no air flow through the radiator.
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Old 09-05-2010, 06:35 PM   #8
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What temp should the first fan come on at?
Mike
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Old 09-05-2010, 07:03 PM   #9
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Here are the factory setting for a 2000 SSEi.
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