Re: PCM is not grounding fans properly
At this point I'm not sure how the fans are suppose to be working. Is there a low speed fan that becomes a high speed fan once the engine hits a certain temp? Is the low speed fan always a low speed fan? And a high speed fan that only runs high? Im just confused on what either fan is suppose to be doing. Going into this I thought the fans ran either 100% or not at all, and were triggered at diff temp. It sounds like they are suppose to be doing something different.
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1977 Chevy C10 SB, Turbo 5.3ls, TH400
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