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I just had this problem last week with my '96 Roadmaster! You must first verify that the primary fan is working. To test it jump start it with the battery. If fan motor runs, the next step is to find somebody who has a scanner that has the ability to turn the primary and or secondary fan on through the PCM (computer). If the fan or fans can't be activated, the PCM has to be replaced and reprogramed. The least expensive way is to obtain a rebuilt PCM and have it reprogramed at a auto parts store that is capable to do this. It will set you back about $50 to $70 for the PCM and another $70+ for the programming. Hope this helps. Chris

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Q: The fuse and relay and fan are okay so Why is 1996 buick roadmaster primary radiator fan not working?
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