5 - 15 ELECTRICAL
GEM Service Manual November 2007
DRIVE AND POWER SYSTEM (Continued)
Step Action Yes No
10a
With the master disconnect switch off, remove fuse
13 and check for continuity.
Proceed to Step 10b. Replace fuse 13.
10b With master disconnect switch on, measure
voltage at pin H of PSDM see page 5-55 for
reference.
Is voltage approximately 72 VDC?
Proceed to step 10c. Replace the PSDM.
10c With master disconnect switch on, measure
voltage at pin 21 of the motor controller module.
Is voltage approximately 72 VDC?
Replace the motor
controller.
Proceed to step 10d.
10d Measure resistance between pin 21 of motor
controller module and pin A of motor temperature
switch.
Is the resistance approximately 0 ohms?
Proceed to step 10e. Replace the wire
harness between the
motor controller and
electric motor.
10e Measure resistance between pin A and B of the
motor temperature switch.
Is the resistance approximately 0 ohms?
Proceed to step 10f. Replace motor
temperature switch.
10f Measure resistance between pin B of the motor
temperature switch and pin H of the PSDM.
Is the resistance approximately 0 ohms?
Proceed to step 11. Replace wire harness
between the PSDM
and electric motor.
11 Check fuse #9 for continuity with the master
disconnect switch OFF. Measure the voltage
between fuse #9 and ground with the master
disconnect switch ON.
Is the voltage approximately 12 VDC?
Proceed to Step 12. Replace the PSDM.
12 Turn the master disconnect switch OFF and the
key switch to ON. Use an ohmmeter and measure
the resistance at PSDM connector J2, pin J and
PSDM connector J3, pin A.
Is the resistance approximately 0 ohms?
Replace the PSDM. Replace the key
switch.
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