2HI to 4HI Selector Switch Input

4WD Selector Switch Wiring Schematic:

OPERATION
When the transfer case is in 2HI and the operator presses the 4HI area of the rocker switch, the 4HI contacts of the selector switch close, connecting circuits 141 and 1564, and furnishing 12-volts to pin C5 of the TCCM connector. The 12-volt signal at pin C5 commands the Transfer Case Control Module (TCCM) to signal the electric-shift motor to shift into 4HI. The contacts return to the open position as soon as the switch is released.