RT115 Tier 2 - CONTROLS 23 IMPORTANT: All four start interlock indicators must be on to start engine. Note: Both indicators are on at the same time. This indicator lights when attachment speed/direction control is in neutral. This indicator is part of the start interlock system. These indicators light when ground drive control is in neutral. These indicators are part of the start interlock system. Attachment Speed/Direction Indicator CONTROL CONSOLE DESCRIPTIONS Ground Drive Indicators p