Repair manuals can be found for free through several websites, but generally require membership to view. AutoZone's website, for example, features a repair guide section that refers to a database of thousands of vehicles and is only accessible through membership.
AutoZone's repair guide feature allows its users to input the make and model of their vehicle into its database. It then prompts them to search for each troubleshooting or repair guide available.
Other websites may have repair manuals which can be downloaded, after paying a small fee. E-book service manuals are generally less expensive than their printed counterparts, but still have all the troubleshooting information and diagrams available to the user.