Go to the Airstream site (airstream.com) and click on Products and then Customer Services, and them Maintenance Books. They may not have your year, but the most recent manual for your trailer type should have wiring diagrams. A little hard to read, but here is little change year to year except between different configurations such as FB vs RB. The diagrams for my trailer date back with minor changes to the introduction of the wide body in the 90s.
John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2013 Silverado 2500HD Duramax/Allison LTZ
WBCCI #9632, TAC TX-10