| Function |
Action |
| F0 |
Directional marker/tail lights |
|
F1 |
Sound on/off |
| F2 |
High horn |
| F3 |
Low horn |
| F4 |
Coupling/auto-buffering |
| F5 |
Active brake |
| F6 |
Door slam |
| F7 |
Compressor |
| F8 |
Drive lock |
| F9 |
Speed-dependent flange squeal |
| F10 |
Dispatch whistle |
| F11 |
Volume (4 settings and mute) |
| F12 |
Roof fan |
F13 |
Sanders |
| F14 |
Exhauster |
| F15 |
Spirax valve |
| F16 |
ETHEL mode (when used as a train heating loco) |
| F17 |
Not used |
| F18 |
Detenators (speed-dependent three bang stop) |
| F19 |
Directional cab lights |
| F20 |
Train running (directional tail lights off) |
| F21 |
Parking lights (reds at both ends) |
| F22 |
Not used |
| F23 |
Not used |
| F24 |
Not used |
| F25 |
Not used |
| F26 |
Not used |
| F27 |
Not used |
| F28 |
Not used |
| F29 |
Not used |
| F30 |
Not used |
| F31 |
Not used |
