ELECTRICAL
9-29
STARTER SYSTEM TESTING
Condition: Starter fails to turn motor. NOTE: Make sure engine crankshaft is free to turn before proceeding
with dynamic testing of starter system. A digital multi-tester 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 volts or
greater
NO
Remove battery and properly service. Install fully
charged shop battery to continue test.
YES
Disconnect R/B engagement wire from the
Connect tester black wire to battery ground. Connect
red tester lead to R/B harness wire at relay. Turn on
ignition switch and depress the starter button. Tester
should read battery voltage.
NO
Check voltage on both sides of circuit breaker, ignition
switch/engine stop switch, starter button and brake
switches. The voltage on both sides should be the
same. NOTE: The ignition switch and engine stop
switch must be on, the starter button and brake
depressed. Replace the defective component.
YES
Test starter relay coil by connecting an ohmmeter between the
coil leads. Resistance should be 3.41 . Check relay ground
path by measuring resistance between the G/Y harness wire
and battery negative terminal (-).
Reconnect the solenoid. Connect the tester black lead
to the battery positive and the red lead to the relay end
of the battery-to-relay wire. Depress starter button.
Reading should be less than.1 V D.C.
NO
Clean the battery-to-solenoid cable ends or replace
the cable.
YES
Connect the black tester lead to relay end of
battery-to-relay cable. Connect red tester lead to relay
end of relay-to-starter cable. Depress starter button.
Reading should be less than .1 V D.C.
NO
Replace the starter relay.
YES
Connect the black tester lead to the relay end of the
relay-to-starter cable. Connect the red tester
starter end of the same cable. Depress the starter
button. Reading should be less than .1 V D.C.
NO
Clean the relay-to-starter cable ends or replace the
cable.
YES
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.
To Next Page
Loading...
Need help?
General
