Bendix Commercial Vehicle Systems WS-20 WHEEL SPEED SENSOR 1/05 - Manual (Page 4)

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3. Reconnect the connector to the sensor lead by plugging
it into the appropriate socket on the pigtail harness, and
pushing until the lock tab snaps into place.
NOTE: It is important for the wheel bearings to be adjusted
per the manufacturer's recommendations, to ensure
that the antilock function does not shut down as a
result of excessive wheel end play.
OPERATIONAL TESTING
To test sensor operation, one of two tests can be done.
TEST 1
Drive the vehicle in a safe area to a minimum speed of 15
mph. Be sure to apply the vehicle brakes several times.
Then stop the vehicle and check the LED display on the
Bendix controller. If the dash light is out and the sensor
LED(s) are not illuminated, the sensor is installed properly.
TEST 2
Disconnect the connector from the sensor's socket or from
the attached lead. Raise the vehicle wheel so it rotates easily.
Connect a volt-Ohm meter (set to read Volts AC) to the pins
on the sensor or lead and spin the wheel. Output voltage
should read greater than .800 AC. If the wheel is spun at 1
revolution per second (about 7mph) the reading should be
greater than 1.0 volts AC.
If the sensor fails to operate as described, check the wiring
from the controller to the sensor. Make sure all connectors
are properly and tightly installed. Check for frayed or
damaged wires and check and/or reset the sensor air gap
(distance from sensor tip to exciter ring) as described in
this manual. For additional troubleshooting information, see
the troubleshooting procedure for the specific antilock system
in use.
BW1662 © 2005 Bendix Commercial Vehicle Systems LLC All rights reserved. 1/2005 Printed in U.S.A.