the key to spring back from the START position to the RUN position. The Yellow ABS warning indicator
should prove-out by illuminating for approximately 1-2 seconds and then turning off.
If the ABS indicator light remains on after prove-out, the module has detected a currently existing fault and has
stored a DTC in memory. This is referred to as a hard fault. A soft fault is one that occurred, caused the
indicator to come on and then went away. These are an intermittent type of fault and will not cause a DTC to be
stored in the module's memory. Continue to Diagnostic Trouble Codes, Retrieving for obtaining diagnostic
trouble codes. If the Yellow ABS warning indicator fails to illuminate, go to the SYMPTOM CHART .
Diagnostic Trouble Codes (DTCs), Retrieving
Verify the ignition switch is in the RUN position (engine does not need to be running). Next, locate the black
RABS diagnostic connector C207. The diagnostic connector C207 has two mating halves, one of which has a
Black/Orange (BK/OG) wire connected to it. Disconnect the two halves.
Attach one end of a jumper wire to the Black/Orange (BK/OG) wire side of the diagnostic connector C207.
Ground the opposite end of the jumper wire by connecting it to a ground until the ABS light begins to flash.
Grounding this wire should start the Yellow ABS warning indicator flashing. If grounding this wire does not
start the Yellow ABS warning indicator flashing, go to the SYMPTOM CHART .
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include
the following long flash in the count to obtain the code number. For example, three short flashes followed by
one long flash indicates diagnostic trouble code 4. The code will continue to repeat itself until the key is turned
off. It is recommended that the code be verified by reading it several times. This code will be used later for
system repair manuals. It should be written down for future use. A diagnostic trouble code 16 is obtained
when the anti-lock brake control module detects normal system operation.
Diagnostic Trouble Codes (DTCs), Erasing
The last step of the system pre-check always includes clearing the Keep Alive Memory (KAM). Turn off the
ignition while the diagnostic connector C207 halves are separated as described in Diagnostic Trouble Codes,
Retrieving. The diagnostic connector C207 should be re-assembled to provide KAM power to the anti-lock
brake control module.
If a valid code has been obtained, go to the SYMPTOM CHART .
Symptom Chart
CAUTION: Care must be taken to connect only the black/orange stripe wire to
ground. Connecting the mating connector wire to ground will result in a
blown fuse.
NOTE:
Code 16 is always present, unless a system concern has been detected and a
DTC has been stored. This code should be used by the technician to verify that
the RAB system is OK. Code 16 will be output by the RABS module when the
technician grounds circuit 571 (BK/OG), or the RABS keep-alive memory fuse
(CJB Fuse 15 [5A]) has blown.
2003 Ford Pickup F150
2003 BRAKES Anti-Lock Control-Rear - F150 Pickup