What is the specification for the vehicle speed sensor in the ABS quick test?

With the ignition Off, measure between pins 21 + 22 on the Hz and mV scale; the specification is 6 mV/Hz or greater.

What does the amber ABS warning light mean on a 1996 Ford Bronco/F-Series?

It warns the driver that the ABS has been disabled. Normal power-assisted braking remains, but the wheels can lock during a panic stop while the indicator is on. If the system is OK, Code 16 will be present.

How do I retrieve ABS diagnostic trouble codes on these trucks?

Use the Rotunda New Generation Star Tester 007-00500 (or equivalent) or the light flash technique. For the Star Tester, turn the ignition off, locate the data link connector labeled ANTI-LOCK TEST in the engine compartment, connect the tester, proceed with on-board diagnostics, and turn the key to RUN.

What multimeter does Ford specify for these ABS measurements?

Rotunda 88 Digital Multimeter 105-00053 or equivalent; if not used, higher wheel speed may be required for the frequency meter to function correctly.

Why must frequency and voltage be measured at the same wheel speed?

Because the result of voltage output divided by frequency does not change with wheel speed, but it is crucial that both measurements are taken at the SAME wheel speed for a valid check of the anti-lock sensor or vehicle speed sensor output.

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1996 Ford Bronco/F-150 ABS Diagnosis & Testing - Quick Test, Code Retrieval

Scanned 1996 F-150 service manual page, ABS quick test specs, inspection, and diagnostic code retrieval

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Scanned Ford service manual page covering ABS quick-test measurements, on-board diagnostics, and Star Tester hookup with circuit illustration.

Part of 1992-1996 Ford Bronco Manual Pages

AI caption June 2017 · Photo 305 of 409

This is page 06-09B-11 from the 1996 Ford F-150, F-250, F-350, Bronco, and F-Super Duty Body/Chassis service manual (dated July 1995), covering diagnosis and testing of the 4-wheel anti-lock brake (ABS) system. It continues a Quick Test table listing multimeter checks for the Vehicle Speed Sensor (pins 21+22, Hz and mV scale, spec 6 mV/Hz or greater), System Diode (pins 18/17, diode check, 0.5 volts), and Main Relay removal check (pins 18/17, continuity). Notes explain checking continuity between Pin 1 and chassis ground, taking frequency and voltage measurements at the same wheel speed, and using the Rotunda 88 Digital Multimeter 105-00053. The Inspection and Verification section describes the amber ABS warning lamp behavior (normal braking remains, Code 16 indicates system OK), on-board diagnostics limitations, and two methods for retrieving diagnostic codes: the Rotunda New Generation Star Tester 007-00500 or the light flash technique. Star Tester hookup steps are given, including locating the ANTI-LOCK TEST data link connector in the engine compartment, with an illustration labeling Circuit 57 Ground, Circuit 603 Output, and Circuit 606 Trigger. A reader can learn ABS test specifications, warning lamp meaning, and how to connect a tester to pull ABS trouble codes.

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Frequently asked questions

What is the specification for the vehicle speed sensor in the ABS quick test?: With the ignition Off, measure between pins 21 + 22 on the Hz and mV scale; the specification is 6 mV/Hz or greater.
What does the amber ABS warning light mean on a 1996 Ford Bronco/F-Series?: It warns the driver that the ABS has been disabled. Normal power-assisted braking remains, but the wheels can lock during a panic stop while the indicator is on. If the system is OK, Code 16 will be present.
How do I retrieve ABS diagnostic trouble codes on these trucks?: Use the Rotunda New Generation Star Tester 007-00500 (or equivalent) or the light flash technique. For the Star Tester, turn the ignition off, locate the data link connector labeled ANTI-LOCK TEST in the engine compartment, connect the tester, proceed with on-board diagnostics, and turn the key to RUN.
What multimeter does Ford specify for these ABS measurements?: Rotunda 88 Digital Multimeter 105-00053 or equivalent; if not used, higher wheel speed may be required for the frequency meter to function correctly.
Why must frequency and voltage be measured at the same wheel speed?: Because the result of voltage output divided by frequency does not change with wheel speed, but it is crucial that both measurements are taken at the SAME wheel speed for a valid check of the anti-lock sensor or vehicle speed sensor output.