Quest Minivan GXE V6-3.3L (VG33E) (2002)
Overdrive Indicator Lamp: Description and Operation
O/D OFF INDICATOR LAMP
During prove out or when overdrive is cancelled, ground is supplied
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to combination meter terminal 12
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from TCM (transmission control module) terminal 13.
With power and ground supplied, 0/D off indicator lamp illuminates.
When TCM detects malfunctioning, the indicator flashes.