Transfer Case Shift Control Switch Indicator Always On - Two or More

Transfer Case Shift Control Switch Indicator Always On - Two or More





Circuit Description
The indicator circuits consist of four individual lamps contained inside the transfer case shift control switch. They are 2HI, 4HI, 4LO and NEUTRAL. The 2HI, 4HI, and 4LO indicators are contained inside their respective range button. The NEUTRAL indicator is located on the front panel of the switch. When the ignition is ON, the transfer case shift control module illuminates the indicator that corresponds to the current ATC gear position by providing a ground through a current limiting driver. The transfer case shift control module flashes each indicator after a shift has been requested, and will continue to flash until the transfer case shift control module can complete the shift.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests the transfer case electrical control of the indicator circuits.
3. This step helps determine a short to ground in the suspect indicator control circuits.
4. This step tests the suspect indicator control circuits for a short to ground.
5. Repair short to ground in the suspect indicator control circuit.