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Workman MD/MDX Page 6 -- 13 Electrical System
Starter/Generator & Voltage Regulator
1. Place machine shift lever in the NEUTRAL position.
Apply parking brake.
2. Raise cargo box and secure with prop rod. Gain ac-
cess to electric components by removing the electrical
cover.
3. Make sure all wires in the charging circuit are con-
nected c orrectly and tightly. Note the correct location of
starter/generator cable and voltage regulator wire at the
start/run solenoid (Fig. 14).
4. Make sure the battery is fully charged. Operate the
vehicle for several minutes so the voltage regulator is
warmed up. Stop engine and turn key to OFF.
5. Test charging circuit:
A. Set multimeter to VDC. Connect red (+) probe of
the multimeter to the positive (+) battery post. Con-
nect black (--) probe of the multimeter to the negative
(--) battery post.
B. Start and run the engine at mid--range RPM.
C. Battery voltage should rise to approximately 14.5
VDC identifying a correctly operating charging cir-
cuit. If the battery has a low charge, this may take a
few minutes.
D. Stop engine and turn key to OFF.
6. If battery voltage did not rise to 14.5 VDC, test start-
er/generator:
A. Disconnect green wire connector from voltage
regulator (Fig. 14). Connect disconnected green
wire lead from starter/generator to ground with a
jumper lead.
B. Set multimeter to VDC. Connect red (+) probe of
the multimeter to the positive (+) battery post. Con-
nect black (--) probe of the multimeter to the negative
(--) battery post.
IMPORTANT: Run engine only long enough to
get battery voltage reading and not for more than
15 seconds.
C. Start and run engine at mid--range RPM.
D. Battery voltage should rise steadily to approxi-
mately 18 VDC identifying a correctly operatingstart-
er/generator.An incorrect readingindicates the need
for starter/generator repair.
E. Stop engine and turn key to OFF.
7. Reconnect green wire connector from the regulator
and test voltage regulator:
A. Set multimeter to VDC. Connect red (+) probe of
the multimeter into the green wire connection. Con-
nect black (--) probe of the multimeter to a known
good ground.
B. Start and run the engine at mid--range RPM.
C. The measured voltage should be approximately
2 VDC when battery is charging and from 6 to 8 VDC
when battery is fully charged. This voltage may rise
to 14 VDC when the accelerator pedal is released
and the engine is coasting to a stop.
D. If measured voltage is incorrect, stop engine and
replace voltage regulator. Retest charging circuit
(Step 5 above).
8. Stop engine and remove multimeter leads.
1. Start/run solenoid
2. Main contact post
3. Voltage regulator
4. Cable to starter/gen.
5. Green wire connector
Figure 14
5
3
4
2
1
Figure 15
1. Terminal A1
2. Terminal A2
3. Terminal F1 location
4. Terminal DF location
3
2
1
4
Electrical
System