Rain Light

Overview

The rain light is a high intensity rear-facing light that is activated in wet conditions to improve visibility for following drivers. The rain light is typically controlled by a switch on the dashboard, or by the ECU in response to a configurable input signal.

For motor sport applications, regulations may require that the rain light is activated under other conditions, such as when following the safety car or if the engine is stalled.

Rain Light Channels

Channel	Description
Rain Light	Indicates the state of the rain light switch input. Depending upon the ECU configuration, the rain light may still be activated when this channel is OFF, for example when the ECU is in limp mode. If required, the state of this channel may be routed to other ECU features, such as CAN Telemetry.

Rain Light Configuration

Option	Description
Rain Light Input Switch	Switch Input, to request activation of the rain light. The state of the switch is indicated by Rain Light.
Rain Light Output	Digital output pin for the rain light. If a negative value is supplied for the pin number here (e.g. ‘-5’), the signal is inverted (on e.g. pin ‘5’).
Rain Light Limp Limp to Rain Light	If ON, the rain light will be activated when the ECU is in Limp Mode. This overrides the Rain Light Input Switch.
Rain Light Stalled Disable	If ON, then the rain light will be unaffected by the engine running state, Otherwise the engine will be considered stalled if Stat Cranking is ON.
Rain Light Pitting Disable	If ON, then the rain light will be unaffected by the state of Road Speed Limiter.
Rain Light Stalled after started	In ON then the stalled condition will only be considered if Has Started is ON. i.e. the engine has been running for a time duration set by After Start. On ECUs without After Start, this may be a fixed value, typically 16 seconds.

Rain Light Flash Rates

Rates that the rain light may flash at, in order of priority: