when you try to pull codes, your fan will kick on low then hi for a couple seconds each.
if your fan kicked on then the ccrm is probably good but not guaranteed
sometimes the fan motor itself is bad, it could be the connector at the motor also (sometimes they melt)
With a multimeter you can do a lot of troubleshooting and find the real problem without hacking into the cars wiring.
motor, connector, ccrm