I've been asked for this frequently, here's the latest versions of the JWA product manuals.
Chuff Generator V3 Documentation.pdf
Super-Chuffer II Documentation.pdf
Pass Car Lighting Kit Documentation.pdf
Pass Car Lighting Module Documentation.pdf
YLB Rev 1.2a Documentation.pdf
Insulated Track Signal Driver Rev. 2 Documentation.pdf
MP3 Universal Sound Module Documentation v1.8.pdf
Locomotive Motion Sensor Installation and Operation.pdf
Edit: Add Sound Module & Motion Sensor documentation.