What components are inside the transfer case assembly?

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

What wire colors connect to the Electronic Shift Control Switch?

Pin 8 GRY, pin 5 BRN/WHT, pin 3 DK BLU, pin 4 WHT/LT BLU, pin 2 ORG/LT BLU, and pin 1 BLK, with RED/YEL power at pin 7 and LT BLU/RED illumination at pin 8.

Does this diagram differ between Bronco and F-Series?

Yes. Connector C221 shows separate F-Series and Bronco pin numbers, the ground splice is S250 for F-Series vs S210 for Bronco, and an LT BLU wire to the rear anti-lock brake module is marked 'F-Series only'.

Where are the 4X4 and Low Range indicator lamps in the circuit?

They are in the instrument cluster at connector C250 (pins 13, 12, 11), fed by a RED/YEL wire and separated by an isolation diode; outputs are LT BLU and LT BLU/BLK.

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1994 Ford Bronco/F-Series Electric Shift 4WD Wiring Diagram - Transfer Case

Wiring diagram of transfer-case shift control module with color-coded wires and connectors

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Wiring diagram for an electronic shift control module showing sensors, connectors, and color-coded wires.

AI caption January 2016 · Photo 2231 of 3001

This document is a wiring diagram (schematic) for the electronic shift 4WD / touch-drive transfer case system used on Ford Bronco and F-Series trucks, uploaded to a 1994 Bronco gallery. It shows four power feeds from the fuse panel: circuit breaker 12 (20A, hot at all times), fuse 18 (10A, hot in run), fuse 17 (10A), and fuse 10 (4A, head position for illumination). The diagram traces circuits through the instrument cluster (connector C250) 4X4 and Low Range indicator lamps with an isolation diode, the Electronic Shift Control Switch, and the Electronic Shift Control Module (connectors C221, C222, C223) with full pinouts, wire colors, and circuit numbers (e.g., 463, 774, 772, 771, 770, 764, 763, 762, 517, 57, 298, 779, 778, 777, 465, 780, 781, 782, 783, 675). It also covers the Transmission Range (TR) sensor (with E4OD and 4R70W variants), the 4X4 Hi/Low indicator switch, and the transfer case assembly containing the speed sensor, motor position sensor, shift motor, and magnetic clutch coil. Splices (S215, S216, S237, S242, S244, S245, S174, S203) and grounds (G106, G200, G203) are labeled, and F-Series vs. Bronco differences are noted, including an F-Series-only feed to the rear anti-lock brake module.

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Frequently asked questions

What fuses power the electronic shift 4WD system on the Ford Bronco?: Per the diagram: circuit breaker 12 (20A, hot at all times), fuse 18 (10A, hot in run), fuse 17 (10A), and fuse 10 (4A, head position) in the fuse panel.
What components are inside the transfer case assembly?: The transfer case assembly contains the speed sensor, motor position sensor, shift motor, and magnetic clutch coil.
What wire colors connect to the Electronic Shift Control Switch?: Pin 8 GRY, pin 5 BRN/WHT, pin 3 DK BLU, pin 4 WHT/LT BLU, pin 2 ORG/LT BLU, and pin 1 BLK, with RED/YEL power at pin 7 and LT BLU/RED illumination at pin 8.
Does this diagram differ between Bronco and F-Series?: Yes. Connector C221 shows separate F-Series and Bronco pin numbers, the ground splice is S250 for F-Series vs S210 for Bronco, and an LT BLU wire to the rear anti-lock brake module is marked 'F-Series only'.
Where are the 4X4 and Low Range indicator lamps in the circuit?: They are in the instrument cluster at connector C250 (pins 13, 12, 11), fed by a RED/YEL wire and separated by an isolation diode; outputs are LT BLU and LT BLU/BLK.