F 550 4WD Super Duty V8-6.4L DSL Turbo (2008)
Wait To Start Light: Description and Operation
GLOW PLUG INDICATOR
The glow plug indicator is located in the instrument cluster and is used to inform the operator when the engine is ready to be started. The indicator is
controlled by the instrument cluster based on an electronic command signal from the PCM through the CAN. The on-time normally varies between 1 and
10 seconds and is independent of the glow plug relay on-time. As a prove out, the indicator is commanded on at every key cycle even though the glow
plug system may not be operating.
