10.38
ELECTRICAL
STARTER SYSTEM TESTING FLOW CHART
Condition: Starter fails to turn over the engine.
NOTE: Make sure engine crankshaft is free to turn before proceeding with dynamic testing
of starter system. A digital multitester must be used for this test
With the tester on the VDC position, place the
tester's black lead on the battery negative and the
red lead on the battery positive. Reading should
be 12.4 V D. C. or greater.
Remove battery and properly service. Install
fully charged shop battery to continue test.
Disconnect coil engagement wire from the starter
solenoid. Connect tester black wire to battery
ground. Connect red tester lead to harness wire at
solenoid. Turn on ignition switch and depress the
starter button. Tester should read battery voltage.
Check voltage on both sides of circuit
breaker, ignition switch/engine stop switch
and starter button. The voltage on both sides
should be the same. NOTE: The ignition
switch and engine stop switch must be on and
the starter button depressed. Replace
component if failed .
Test starter solenoid coil by connecting an ohmmeter between the solenoid
wire and the solenoid mounting plate. Resistance should be 3.4
. Check
solenoid ground path by measuring resistance between mounting plate and
battery negative terminal (-).
Reconnect the solenoid. Connect the tester black lead
to the battery positive and the red lead to the solenoid
end of the battery-to-solenoid wire. Depress starter
button. Reading should be less than .1 V D.C.
Clean the battery-to-solenoid cable ends
or replace the cable.
Connect the black tester lead to solenoid end of
battery-to-solenoid cable. Connect red tester lead
to solenoid end of solenoid-to-starter cable.
Depress starter button. Reading should be less than
.1 V D.C.
Replace the starter solenoid.
Connect the black tester lead to the solenoid end of
the solenoid-to-starter cable. Connect the red
tester lead to the starter end of the same cable.
Depress the starter button. The reading should be
less than .1 V D.C.
Clean the solenoid-to-starter cable ends or
replace the cable.
If all of these indicate a good condition, yet the starter still fails to
turn, the starter must be removed for static testing and inspection.
Yes
Yes
Yes
Yes
No
No
No
Yes
No
No
Voltage Drop
Testing
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