Aerostar 2WD V6-245 4.0L (1990)
ABS Light: Testing and Inspection
Two warning lamps are located on the instrument panel to alert the driver to a system malfunction. The red brake warning lamp is used to indicate
conventional brake system malfunctions such as low fluid level, parking brake applied and low vacuum conditions (diesel engines only). The yellow
anti-lock system warning lamp is used to indicate proper warning lamp circuit operation (2 second illumination with ignition On or engine cranking). If
yellow lamp comes on while vehicle is being driven, it is alerting the driver of an anti-lock system malfunction and yellow lamp can then be used to
access flashout codes. This self-test feature contains codes to indicate area of system malfunction. When a malfunction is detected within the system,
the computer module will shut down the anti-lock system and illuminate the yellow warning lamp on the instrument panel. This will permit normal
braking and at the same time will store a code in the system memory which can be retrieved by grounding the diagnostic connector of the computer
module and counting the number of flashes of the yellow light. If the ignition is turned off before diagnosis is performed, the code stored will be lost. In
this case, the vehicle must be started and driven to reproduce the condition. If more than one fault exists, only the first code recorded will be displayed.
Additional codes will output only after the first fault has been corrected.
