WARN winch wont work

Hi, I went to load the bike in the truck today, I normally use the winch to secure it to my headache rack, I flicked it on free spool, pulled the cable out and when I flicked it back to tighten it up there was nothing. I had the bike in the truck sunday and used the winch and it worked great. Wondering if anyone has any ideas what this may be. Thanks in advance