Starter Motor Solenoid Voltage Test
Prior to conducting this test, make sure the battery is fully
charged and in good condition, see
Testing the Battery
.
This is a 2-part test. Part 1 (steps 1-6) tests the starter motor
solenoid input or feed voltage and part 2 (steps 7- 12) tests
the solenoid output voltage. BOTH tests must be done for
accurate starter motor diagnostics.
1. Obtain a digital multimeter.
2. Connect the RED test lead to the volt/ohm receptacle
of the meter and the BLACK test lead to the COM
receptacle of the meter.
3. Select DC VOLTS on the multimeter.
4. Connect the RED test lead probe to the INPUT/
FEED terminal (
A
, Figure 29) of the starter motor
solenoid.
29
5. Connect the BLACK test lead probe to a good GROUND.
6. Observe the multimeter display and record result.
The multimeter display should indicate battery voltage,
confirm by testing battery voltage, see
Battery Voltage
Test
. If the multimeter DOES NOT display battery
voltage, check the cables, wiring and electrical
connections between the battery POSITIVE (+) terminal
and the solenoid INPUT/FEED terminal (
A
).
7. For testing the solenoid output voltage, proceed as
follows:
8. Disconnect BOTH ignition wires from the spark plugs.
NOTE:
On gaseous-fueled standby generator engines, turn
fuel supply OFF.
9. Connect the RED multimeter test lead probe to the
OUTPUT terminal (
B
) of the starter motor solenoid.
10. Connect the BLACK multimeter test lead probe to a good
GROUND.
11. Turn the key switch to START and observe the
multimeter display.
12. The multimeter display should indicate battery voltage.
If the multimeter display DOES NOT indicate battery
voltage, the solenoid is faulty. Replace starter motor
solenoid, see
SECTION 6 - SERVICE ENGINE
SUBASSEMBLIES - Starter Motor Solenoid
.
If the multimeter display indicates
0 volts
, conduct a
Starter Motor Solenoid Continuity Test
. See test in this
section.
If battery voltage is present, but the starter motor DOES
NOT spin, the starter motor may be faulty. Conduct a
Starter Motor Solenoid Load and Current Draw Test
prior to replacing the starter motor. See
SECTION 4 -
REMOVE EXTERNAL ASSEMBLIES - Starter Motor
for
replacement procedure.
Starter Motor Solenoid Load and Current Draw Test
Prior to conducting a solenoid load test, you must conduct a
battery load test, see
Battery Load Test
in this section. The
results of the battery load test are necessary for comparison
to the solenoid load test.
On standby home generator applications, disconnect the
battery maintenance/trickle charger circuit prior to conducting
the solenoid load and current draw test. The additional
voltage and current supplied by the charging circuit can alter
the test results.
1. Obtain a digital multimeter.
2. Disconnect BOTH ignition wires from the spark plugs.
NOTE:
On gaseous-fueled standby generator engines, turn
fuel supply OFF.
3. Connect the RED test lead to the volt/ohm receptacle
of the meter and the BLACK test lead to the COM
receptacle of the meter.
4. Select DC VOLTS on the multimeter.
5. Connect the RED test lead probe to the POSSITIVE (+)
or INPUT/FEED solenoid terminal.
6. Connect the BLACK test lead probe to a good GROUND.
44
Summary of Contents for BIG BLOCK M540000
Page 46: ...Special Tools Image Chart 30 47...
Page 74: ...84 75...
Page 75: ...85 76 vanguardpower com...
Page 81: ...94 82 vanguardpower com...
Page 111: ...Vanguard Model 540000 145 112 vanguardpower com...
Page 113: ...Vanguard Model 610000 146 114 vanguardpower com...
Page 136: ...176 137...
