QM-7 SERIES SERVICE MANUAL
PAGE 6.3
JANUARY 2012
SUNRISE MEDICAL
Section 6
9. Measure the resistance of the park brake
assembly by connecting a Multimeter to the small
pins of the 4-pin connector (
fi
gure. 6.3.1). Normal
resistance is approximately 12 to 15 ohms.
10. Measure the resistance through the motor
brush assembly and motor by connecting a
Multimeter to the large pins of the 4-pin connector
(
fi
gure. 6.3.2). Normal resistance is approximately
.5 to .9 ohms.
fig. 6.3.1
fig. 6.3.2
Note: New brush readings may be different than those recorded above. The new brush
assemblies should be run-in prior to measuring their resistance. Contact Sunrise Technical
Service if the readings are either signifi cantly higher or lower than those recorded above.
Measure Resistance
