Light Bell Horn Ditch lights/Acc 1 Coupling 1 Brake Release/Squeal Dynamic Brake Air Hose/Uncoupling Lever Shut Down/Notch Down Fan/Notch Up Rail Clack Traction Air Compressor Prime Mover Type Acc 2/Short Air Release Coupling 2 Air Pump Loco Sound Flange Noise 1 Bell Type Horn Type Loco Sound Bell Volume Horn Volume Diesel Rumble Volume Coupling 3 Air Release Flange Noise 3 Sand Drop Ditch Lights Flash Linear Slow increase at slow speed Fast increase at slow speed Normal Headlights Off / Dim / Bright Cycle Rule 17 Auto notch - RPM and notch synchro to speed Manual notch - notch down/up with F8/F9 SD45 MP15 Off MRC