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Old 03-20-2018, 10:05 PM   #22
ls1nova71
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Join Date: Dec 2009
Location: Independence Mo
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Re: PCM is not grounding fans properly

Quote:
Originally Posted by jrpontiac View Post
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.
Just to clear this up for you, the way you have it wired, one relay for each fan, they should come on at different temps, but run at full speed. The actual temperature that the fans come on is settable by the tuner, so I cant say for sure what temp it should be. So basically, when the low speed temp is reached, one of your fans should come on, at full speed, then when it reaches the second higher temp, the other fan should come on at full speed.

I would email Brendan and have him look at the file to make sure they actually got enabled, he's only human, and things do happen from time to time. Hope this helps.
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