Finding a bad credit loan will depend on the type of loan you want. It will also depend on how bad of a credit history you have.
If you use the internet as a resource, you will find tons of websites touting their ability to get you a loan. The problem is that most of these sites are actually affiliate sites and not an actual lender.
If you fill out the simple forms on these sites, your personal info goes to dozens of other lenders. That's great, if you do not care about where your personal information goes. But, be ready for the onslaught of phone solicitations.
I hate to say this, but your best bet in getting a bad credit loan is to actually use the local yellow pages. You can call local lenders willing to do payday loans and title loans. Have a brief general discussion about their requirements, interest charged, etc. As long as you have a general idea of your credit score you should not have to give them any personal info.
They will want your info up front. But, just tell them your are just getting an idea of what is available.
Call a few local places find the best rate and terms and you are set.
If you were a bit more specific about the type of loan you are looking for and your credit score, i might be able to come up with a bit of a more detailed answer.