I could test them both at the same time and look for similarity (pins 6 and 7, right?) and the fan's connector.Sounds like an issue to me (time to replace or renew the fan motor).
Are we still not sure why you don't see the same voltage at the HEDF output at the CCRM and the fan's connector? Even if the fan motor was toast, unless there was a CB in between the two, they should show the same voltage.
But, yes we don't know why they're different. And there's defiantly no CB, I looked up images to compare and be sure, you were right, it would've been very obvious.