What wire circuit feeds the ABS warning lamp?

The amber ABS warning lamp in the instrument cluster is fed by circuit 640 R/Y from fuse 17 (10A) at pin 13, with output on circuit 603 DG at pin 3 going to the ABS module and data link connector.

Where are the pump motor relay and main relay located?

Both the pump motor relay and the main relay are shown inside the power distribution box; the system diode is in the trailer relay box.

What are the wheel speed sensor wire colors?

Left front brake anti-lock sensor uses circuits 521 T/O and 522 T/BK; the right front sensor uses 514 Y/R and 516 Y/BK. The vehicle speed sensor uses 523 R/PK and 519 LG/BK.

What are the hydraulic control unit connector pin assignments?

Pins are labeled 1 B+, 4 B+, 7 IFL, 5 IFR, 6 OFL, 8 OFR, 2 OR, and 3 IR, plus a pump motor/motor sensor connector with pins 1–4 and a 57 BK ground.

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1996 Ford Bronco 4WABS Wiring Diagram - ABS Module Connector Pinout & Circuits

Anti-lock brake system wiring diagram with fuse panels, relays, sensors and color-coded wires

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Wiring diagram of the anti-lock brake control module showing fuse panels, relays, sensors and color-coded circuit wiring.

AI caption July 2011 · Photo 127 of 224

This document is a wiring diagram for the 4-wheel anti-lock brake system (4WABS) on a mid-1990s Ford truck, uploaded to a 1996 Ford Bronco gallery. It shows power feeds from the IP fuse panel: fuse 8 (30A, hot at all times), fuse 5 (15A, hot in run), fuse 2 (30A, hot at all times), and fuse 17 (10A, hot in start or run). Power routes through the pump motor relay and main relay in the power distribution box, and a system diode in the trailer relay box, to the anti-lock brake electronic control module. The diagram identifies module connector pin numbers (1–40 range shown) and circuit numbers with wire colors, such as 534 Y/LG, 601 LB/PK, 532 O/Y, 603 DG, 530 LG/Y, and 511 LG. Connected components include the amber ABS warning lamp in the instrument cluster, the data link connector, PSOM connector, left and right front wheel anti-lock sensors, vehicle speed sensor, acceleration sensor, stoplight switch (feeding fuse 13), and the anti-lock hydraulic control unit with pump motor and motor sensor (pins labeled B+, IFL, IFR, OFL, OFR, OR, IR). A note references EVTM Cell 42 for more circuit details. Diagram reference number H8686-D appears at bottom right.

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Frequently asked questions

Which fuses power the 4-wheel ABS system?: Per the diagram: IP fuse panel fuse 8 (30A, hot at all times), fuse 5 (15A, hot in run), fuse 2 (30A, hot at all times), and fuse 17 (10A, hot in start or run).
What wire circuit feeds the ABS warning lamp?: The amber ABS warning lamp in the instrument cluster is fed by circuit 640 R/Y from fuse 17 (10A) at pin 13, with output on circuit 603 DG at pin 3 going to the ABS module and data link connector.
Where are the pump motor relay and main relay located?: Both the pump motor relay and the main relay are shown inside the power distribution box; the system diode is in the trailer relay box.
What are the wheel speed sensor wire colors?: Left front brake anti-lock sensor uses circuits 521 T/O and 522 T/BK; the right front sensor uses 514 Y/R and 516 Y/BK. The vehicle speed sensor uses 523 R/PK and 519 LG/BK.
What are the hydraulic control unit connector pin assignments?: Pins are labeled 1 B+, 4 B+, 7 IFL, 5 IFR, 6 OFL, 8 OFR, 2 OR, and 3 IR, plus a pump motor/motor sensor connector with pins 1–4 and a 57 BK ground.