Part Time Indicator

The part time indicator gives an indication to the vehicle operator that a part time operating mode of the 4 wheel drive transfer case is selected. On vehicles equipped with the standard Command-Trac 4 wheel drive system, the part time indicator lights when the transfer case is engaged in the 4H or 4L positions. On vehicles in some markets where the Selec-Trac 4 wheel drive system is an available option, the part time indicator lights when the transfer case is engaged in the 4x4 Part Time or 4L positions. This indicator is controlled by a transistor on the instrument cluster electronic circuit board, and is controlled by a hard wired transfer case switch input to the cluster. The part time indicator LED receives battery current on the instrument cluster electronic circuit board through the fused ignition switch output (run-start) circuit whenever the ignition switch is in the ON or START positions. The LED will always be off when the ignition switch is in any position except ON or START. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will turn on the part time indicator for the following reasons: transfer case switch input, and actuator test.