BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual 12
BENDIX GSBC DISPLAY & BEHAVIOR AT STARTUP CONT.
NOTE: Refer to the GSBC Dash Display Indicator Lamps and Operation section starting
on page 14 for more information about each lamp.
TRAILER ABS INDICATOR LAMP
The yellow trailer ABS indicator lamp is typically located in the vehicle display of
tractors or other towing vehicles. The trailer ABS indicator lamp functions similarly
to the tractor ABS indicator lamp, as long as a trailer with a trailer ABS system is
connected electrically to the towing vehicle. At each ignition, the trailer indicator
lamp should illuminate for approximately three (3) seconds and then turn o. If the
lamp does not turn o, one of the vehicle(s) connected to the power unit may have
a faulty trailer ABS unit. If there is no trailer, the trailer does not have a trailer ABS
unit, or if the trailer ABS unit is powered only by brake lamp power, the lamp will
not remain illuminated.
All new trailers built after March 1, 2001 must support the dashboard mounted
trailer ABS indicator lamp. Trailers built after March 1, 1998 (in the United States)
or April 1, 2000 (in Canada) must be equipped with a trailer ABS unit, but are
not required to support a dashboard mounted trailer ABS indicator lamp.
The mode of operation of the trailer ABS indicator lamp (as equipped) will vary
depending on how the ABS system is powered.
• For full-time-powered ABS (usually obtaining power over the blue wire of
the J560 connector): The trailer ABS warning lamp will function just like the
tractor ABS indicator lamp.
• For brake-light-only powered ABS: Each time the brakes are applied when
the vehicle is stationary, the indicator lamp will come on for approximately
three (3) seconds and then turn o. If the lamp remains on during braking, the
trailer’s ABS may not be operating. The trailer will retain normal service braking,
although without the benets of ABS. Have the trailer serviced as soon as possible
to restore ABS operation.
In both cases where the warning lamp stays illuminated for longer than three (3)
seconds, the trailer will retain normal service braking, although without the benets
of ABS. Have the trailer serviced as soon as possible to restore ABS operation.
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