Malfunction Indicator Lamp: Description and Operation

MALFUNCTION INDICATOR LAMP
During prove out or when an engine control malfunction occurs, ground is supplied:
- to combination meter terminal (64)
- from ECM terminal (18).
With power and ground supplied, the malfunction indicator lamp illuminates.
For further information, refer to ["Malfunction Indicator Lamp (MIL)", "ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION"].