BRAKES - REAR ANTI-LOCK BRAKE SYSTEM (RABS) - ADVERSE BRAKING CHARACTERISTICS - RABS WARNING LIGHT NOT ON, MAY OC

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Article No. 93-17-9​

BRAKES - REAR ANTI-LOCK BRAKE SYSTEM (RABS) - ADVERSE BRAKING CHARACTERISTICS - RABS WARNING LIGHT NOT ON, MAY OCCUR WHEN INCORRECT RABS MODULE IS INSTALLED - SERVICE TIP BRAKES - REAR ANTI-LOCK BRAKE SYSTEM (RABS) - INCORRECT (RABS I) ELECTRONIC CONTROL UNIT INSTALLED IN RABS II EQUIPPED VEHICLES - SERVICE TIP

Article No.
93-17-9BRAKES - REAR ANTI-LOCK BRAKE SYSTEM (RABS) - ADVERSE BRAKING CHARACTERISTICS - RABS WARNING LIGHT NOT ON, MAY OCCUR WHEN INCORRECT RABS MODULE IS INSTALLED - SERVICE TIPBRAKES - REAR ANTI-LOCK BRAKE SYSTEM (RABS) - INCORRECT (RABS I) ELECTRONIC CONTROL UNIT INSTALLED IN RABS II EQUIPPED VEHICLES - SERVICE TIP

LIGHT TRUCK:

1987-90 BRONCO II 1987-92 BRONCO 1987-93 F-150-350 SERIES 1989-93 RANGER 1990-93 AEROSTAR, ECONOLINE 1991-92 EXPLORER

This TSB article is being republished in its entirety to extend the F-Series application to include F-150 through F-350 Vehicles.

ISSUE:​

Adverse braking characteristics and failure of the RABS light to indicate a RABS failure may be caused by improper servicing of RABS II equipped vehicles with RABS I electronic control units.

ACTION:​

When replacing a RABS electronic control unit, refer to the following RABS Module Chart for correct parts usage.
RABS II modules have been designed with Keep Alive Memory and are to be used to service all prior year RABS I systems, except for 1987 and 1988 Bronco II vehicles.

MODEL YEAR​	VEHICLE LINE​	SERVICE PART NUMBER​
RABS MODULE (ECU) SERVICE CHART​
1987-91​	F-SRW​	F3PZ-2C018-A​
1992-93​	F-SRW​	F3PZ-2C018-C​
1987-91​	F-DRW​	F3PZ-2C018-B​
1992-93​	F-DRW​	F3PZ-2C018-D​
1987-91​	BRONCO​	F3PZ-2C018-A​
1992 ONLY​	BRONCO​	F3PZ-2C018-C​
1990-91​	E-SRW​	F3PZ-2C018-E​
1992-93​	E-SRW​	F3UZ-2C018-A​
1990-91​	E-DRW​	F3PZ-2C018-F​
1992-93​	E-DRW​	F3UZ-2C018-B​
1990-93​	AEROSTAR​	F29Z-2C018-A​
1989-93​	RANGER​	F29Z-2C018-A​
1991-92​	EXPLORER​	F29Z-2C018-A​
1987-88​	BRONCO II​	F3PZ-2C018-G​
1989-90​	BRONCO II​	F29Z-2C018-A​

SRW = SINGLE REAR WHEEL; DRW = DUAL REAR WHEEL

PART NUMBER​	PART NAME​
F3PZ-2C018-A​	RABS Module​
F3PZ-2C018-B​	RABS Module​
F3PZ-2C018-C​	RABS Module​
F3PZ-2C018-D​	RABS Module​
F3PZ-2C018-E​	RABS Module​
F3UZ-2C018-A​	RABS Module​
F3PZ-2C018-F​	RABS Module​
F3UZ-2C018-B​	RABS Module​
F29Z-2C018-A​	RABS Module​
F3PZ-2C018-G​	RABS Module​

OTHER APPLICABLE ARTICLES:​

NONE

SUPERSEDES:​

93-15-16

WARRANTY STATUS:​

INFORMATION ONLY

OASIS CODES:​

206000, 301000
You also may want to make sure that you don't have kinked metal brake line or collapsed rubber flex hose to the rear differential. You can crack the line loose on the RABS valve to the rear brakes and lightly press the brake pedal down and see if you get brake fluid from it then proceed down the line to the rear wheel cylinders doing the same thing. Checking the fluid.
By

A. Penland, Ford