What fuse powers the electronic shift transfer case system?

Power comes from fuse panel position 17, a 10A fuse that is hot in start or run, feeding circuit 640 R/Y through splice S215 to the Electronic Shift Control Switch (see fuse panel pages 13-3 and 13-9).

What components are inside the transfer case assembly on this diagram?

The transfer case assembly contains a speed sensor, a motor position sensor, the shift motor, and a magnetic clutch coil.

What wire circuits connect the shift control switch to the electronic shift control module?

Circuits 780 DB, 465 W/LB, 781 O/LB, and 782/702 BR/W run from the switch through connector C223 to the module, along with 784 LB/BK and 783 GY/210 LB branches to the instrument cluster and anti-lock brakes.

How is the electronic shift control switch grounded?

Through circuit 57 BK from connector C267, via splice S202 to ground G201 (see Grounds, page 10-12).

Which circuit operates the magnetic clutch coil?

Circuit 779 BR from the electronic shift control module, through connectors C222 and C220 to pin 1 of the transfer case connector.

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1993 Ford Bronco Electronic Shift Transfer Case Wiring Diagram (4x4 E-Shift)

Electronic shift wiring diagram with shift control module, motor position sensor and color-coded wires

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Wiring diagram for the electronic shift transfer-case system showing the shift control module, motor position sensor, and color-coded circuits.

AI caption November 2005 · Photo 135 of 484

This document is a Ford factory-style wiring diagram for the ELECTRONIC SHIFT transfer case system, uploaded to a 1993 Ford Bronco gallery as "Auto-Tcase.JPG". It shows the complete electric shift-on-the-fly circuit: power feed from fuse panel position 17 (10A, hot in start or run, circuit 640 R/Y through splice S215), the Electronic Shift Control Switch (4X4/LO positions, connector C267) with instrument illumination feed (19 LB/R) and ground path (57 BK through S202 to G201). Wiring runs to the Electronic Shift Control Module via circuits 780 DB, 465 W/LB, 781 O/LB, 782/702 BR/W (connector C223), plus 784 LB/BK and 210 LB/783 GY branches to the instrument cluster (C250) and anti-lock brakes (S244, C209). The module's output side (connectors C220/C221/C222) drives the Transfer Case Assembly, containing the speed sensor (circuits 774 LG, 772 LB), motor position sensor (762, 763 Y/W, 760 O/W, 764 BR/W, 770 W, 771), shift motor (777 P/Y, 778 O), and magnetic clutch coil (779 BR). Cross-references cite Power Distribution (page 13-16), Grounds (page 10-12), Instrument Illumination (page 71-1), Instrument Cluster (page 60-2), Anti-Lock Brakes (page 42-2), and Fuse Panel (pages 13-3, 13-9). A reader can trace wire colors, circuit numbers, connector IDs, and pin locations for diagnosing electric transfer case shift problems.

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Frequently asked questions

What fuse powers the electronic shift transfer case system?: Power comes from fuse panel position 17, a 10A fuse that is hot in start or run, feeding circuit 640 R/Y through splice S215 to the Electronic Shift Control Switch (see fuse panel pages 13-3 and 13-9).
What components are inside the transfer case assembly on this diagram?: The transfer case assembly contains a speed sensor, a motor position sensor, the shift motor, and a magnetic clutch coil.
What wire circuits connect the shift control switch to the electronic shift control module?: Circuits 780 DB, 465 W/LB, 781 O/LB, and 782/702 BR/W run from the switch through connector C223 to the module, along with 784 LB/BK and 783 GY/210 LB branches to the instrument cluster and anti-lock brakes.
How is the electronic shift control switch grounded?: Through circuit 57 BK from connector C267, via splice S202 to ground G201 (see Grounds, page 10-12).
Which circuit operates the magnetic clutch coil?: Circuit 779 BR from the electronic shift control module, through connectors C222 and C220 to pin 1 of the transfer case connector.