Transfer Case Feed Harness Circuits

Transfer Case Feed Harness Location For Borg-Warner Model 13-50:

Electronic Transfer Case Feed Harness:

The electric transfer case feed harness contains ten wires that carry a variety of information to and from the Electronic Control Module (ECM).

A listing of the transfer case feed harness circuits and their functions follows:
1. The electro-magnetic clutch feed circuit provides a power signal to the clutch coil from the ECM when shifting from 2W to 4W drive.
2. CLOCKWISE rotation of the electric shift motor circuit provides power to drive the shift motor through the 2H-4H-4L sequence. If a position is selected that would require a shift through an intermediate position, the module will respond as if each intermediate position was selected, even if the 4L position was commanded from 2H. It will then fulfill all of the requirements for shifting into or out of each intermediate position.
3. COUNTERCLOCKWISE rotation of the electric shift motor circuit provides power to drive the shift motor through the 4L-4H-2H sequence. Actuation of the Low Range Switch, while in 4L, will cause a shift to 4H. Actuation of the "Four-by-Four" 2W-4W switch, after a shift to 4H from 4L, will then cause a shift to 2H.
4. The speed sensor coil feed circuit provides a constant signal from the ECM to the speed sensor located in the transfer case.
5. The speed sensor coil return circuit provides a varying signal (while the vehicle is in motion) from the speed sensor to the ECM. This signal indicates the vehicle speed to the microprocessor so that it can control the application of the "Low Range" gear selection in the transfer case.
6. The shift position sensor feed circuit provides a power signal from the ECM to the shift position sensor to energize the sensor.
7. Shift position sensor return circuits provide the output information signals from the transfer case to the ECM. This information gives the control module the correct position of the shaft that turns the helical cam in the transfer case.