Wait to Start Indicator (Diesel Only)

The PCM provides the ground for the wait to start indicator. The glow plugs and the wait to start indicator operate at the same time. The light illuminates until the PCM has provided time for the glow plugs to heat the combustion chamber. The PCM then opens the indicator ground circuit, turning off the indicator lamp. The wait to start indicator prove-out is in the RUN position and is controlled by the PCM.