The fan relay is switched on as soon as the the air conditioning is selected via the controls. The fan continues to run even if the compressor cycles off due to low temperature in the cabin. I think the van commodore was the first to use a thermo switch in the radiator?
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Should say VN commodore
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D8F8E062-02D0-452B-8778-C651BD3CC97A.jpeg
This is a photo of the HJ Holden fan relay
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