BENDIX M-21-M-22 ANTILOCK MOD ASSY Guía de instalación descargar pdf (Pagina 43)

MBS-2 Installation

2. Check for auxiliary power at the J560 connector from the tractor (center

pin). If a light tester is used, be sure to supply voltage to the tester using a

battery. A battery charger may be used to keep the battery charged but

may not be connected to the tester if a battery is not present. If there is

no power on the center pin, the backup feature will not operate. Auxiliary

power should also be present at the ABS power connector, pin B of the

Weather Pack 5-way located in front of the slider hose bracket mounted to

the trailer underbody. If no power is present, check the connections of the

ABS power cable in the J560 connector. The red wire should be on the

bottom pin (red) the blue wire should be on the center pin (blue) and the

white wire should be on the ground circuit (white). If power is present at

the J560 connector, check the ABS harness for damage.

IMPORTANT: When performing the troubleshooting step below

spin the wheels in a slow, deliberate manner.

3. The reverse lamp circuit receives power from the accessory cable (the

eighteen-inch long harness exiting the ECM housing and terminating in a

Deutsch four-socket DTM06-4S connector). When holding the connector

with the sockets facing you and the connector clasp at the top, the

sockets are numbered one through four counterclockwise, starting in the

top left position. Socket one is the backup circuit. Using a voltage tester,

confirm that 12 VDC is present on socket one when the wheels are

rotated in the reverse direction. Socket two works the opposite way, power

is present full time until the wheels are reversed. Socket two can be

checked for power to confirm the ABS is receiving adequate power. If

power is not present on socket one when the wheels are reversed, but is

present on socket two, the system is not receiving a wheel speed signal

from one of the sensors. If this is the case, a sensor signal fault should be

present on the system (a three or five flash fault). Check sensor wiring for

damage.

4. If power exists in all the above areas, there is a problem with the backup

harness (the harness between the ABS and the backup lamps). Check

the pins in the mating plug on the backup harness to be sure they are not

bent or missing, and verify the lamps have sufficient ground.

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BENDIX M-21-M-22 ANTILOCK MOD ASSY Guía de instalación Pagina 43