What wire circuits are involved in ABS Code 25?

Circuit 532 (Orange/Yellow) and Circuit 498 (Pink), running between the 4-wheel anti-lock brake hydraulic control unit connector and the ABS electronic control module connector.

What is the resistance spec for the outlet right front dump valve?

The diagram labels the outlet right front dump valve as 3-6 ohms.

Which connector pins should be checked for terminal backout for Code 25?

Pin 15 at the anti-lock brake electronic control module connector, and Pins 1, 4 and 8 at the anti-lock hydraulic control unit connector.

Which vehicles does this ABS diagnosis page apply to?

The footer states it applies to 1996 F-150, F-250, F-350, Bronco, and F-Super Duty (Body, Chassis manual, July 1995).

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1996 Ford Bronco/F-Series 4-Wheel ABS Code 25 Circuit Diagram (06-09B-35)

1996 Ford 4-Wheel Anti-Lock Brake connector pinout and Code 25 description, front right valve circuit 498 PK, page 06-09B-35

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4WABS diagnosis page showing hydraulic control unit and electronic control module connector pinouts plus Code 25 description: open/shorted front right outlet valve coil on circuit 498 PK.

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This is a scanned page (06-09B-35) from the 1996 Ford Body/Chassis service manual section 'Brake, Anti-Lock, 4-Wheel' covering Diagnosis and Testing for ABS trouble Code 25. The page shows the 'Affected Circuit(s)/Electrical Component(s)' diagram for Code 25, including the 4-wheel anti-lock brake hydraulic control unit connector (harness side and component side views, pins 1, 4, 5 and 8), the outlet right front dump valve (3-6 ohms), and the 4-wheel anti-lock brake electronic control module connector (harness side). Wire circuits are identified as Circuit 532 (Orange/Yellow) and Circuit 498 (Pink), with all connector views shown looking into the connector. The Description explains that Code 25 is generated by the ABS electronic control module detecting an open or shorted Circuit 498 (PK), an open or shorted outlet front right valve coil, or an open or shorted driver within the module. Possible contributing concerns listed include an intermittent open in Circuit 498 (PK), terminal backout at ECM connector Pin 15, terminal backout at hydraulic control unit connector Pins 1, 4 and 8, an open/shorted outlet front right valve coil, and an open/shorted driver in the module. The footer confirms applicability to 1996 F-150, F-250, F-350, Bronco, and F-Super Duty.

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Frequently asked questions

What causes ABS Code 25 on a 1996 Ford Bronco or F-Series truck?: Per this page, Code 25 is generated by the anti-lock brake electronic control module detecting an open or shorted Circuit 498 (PK), an open or shorted outlet front right valve coil, or an open or shorted driver in the anti-lock brake electronic control module.
What wire circuits are involved in ABS Code 25?: Circuit 532 (Orange/Yellow) and Circuit 498 (Pink), running between the 4-wheel anti-lock brake hydraulic control unit connector and the ABS electronic control module connector.
What is the resistance spec for the outlet right front dump valve?: The diagram labels the outlet right front dump valve as 3-6 ohms.
Which connector pins should be checked for terminal backout for Code 25?: Pin 15 at the anti-lock brake electronic control module connector, and Pins 1, 4 and 8 at the anti-lock hydraulic control unit connector.
Which vehicles does this ABS diagnosis page apply to?: The footer states it applies to 1996 F-150, F-250, F-350, Bronco, and F-Super Duty (Body, Chassis manual, July 1995).