PRNDL Indicator

The PRNDL Indicator indicates the gear selection for Automatic Transmissions. The PRNDL Indicator receives coded input through four wires from the Transmission Range Selector (part of the Park/Neutral Position Switch). Depending upon which combination of the four wires to the PRNDL Indicator are grounded, a gear selection indication light emitting diode (LED), e.g. Reverse (R), is illuminated. The indications are separate from the Transmission's inputs to the Vehicle Control System (Gasoline) or the Powertrain Control Module (Diesel).