What is the best free source for repair info?

SpotOnAuto has free repair guides for most common jobs, plus wiring diagrams and DTC code lookups. YouTube is great for visual walkthroughs too. Channels like ChrisFix, South Main Auto, and Scanner Danner cover everything from basic to advanced diagnostics.

Your local library might have free access to Chilton Library online. Many library systems include it with your library card. Full repair procedures, specs, and TSBs. Log in with your library card number on their website.

The factory service manual for your specific car is the gold standard. Many are available as PDFs on enthusiast forums. Search your car plus factory service manual PDF and you will usually find it. These are the same manuals dealership techs use.