North British class 22 diesel hydraulic sound decoder and speaker (21) (A) updated model)

This decoder is for the updated models numbered as follows 4D-012-004/005/006/007/008. Do not use the earlier version B as the lighting is effected EARLIER VERSION B AVAILABLE  --PLEASE CLICK HERE-- Below is a list of the Function keys and their assignments applicable to this model. F0. Lights on/off (if fitted) F1. Sound on/off F2. Double horn F3. Double horn F4. Single horn F5. Buffer up F6. Coupling up F7. Guards whistle F8. Carriage door slam F9. Flange squeal F10. Wheel/track ‘groan’ F11. Buffer clash sequence on wagons F12. Shunting mode. Press once and the loco moves slowly, press it again and you are back to normal control F13. Acceleration/Brake override. This function overrides the normal acceleration and braking settings. F14. Aux 1 cab light no.1 end F15. Aux 2 cab light no.2 end