For vehicles older than 2010 (the classic Ford Ranger, Crown Vic, or Lincoln Town Car), Ford has kept a static archive. You can sometimes find the old PDF versions of ETIS wiring diagrams floating on forums, but the live interactive database is sunset.
Historically, www.etis.ford.com served as the unified portal for both vehicle data and technical manuals. However, as web technologies evolved, Ford bifurcated these services to improve user experience. www.etis.ford.com fordservice