TM 5-3800-205-23-1
TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0005 00
TROUBLESHOOTING USING MULTIMETER - CONTINUED
(1)
Corroded ground cable-to-frame connection. Clean ground cable-to-frame connection (WP 0033 00)
and retest.
(2)
Frayed or cut ground cable. Replace ground cable (WP 0033 00) and retest.
(3)
Battery disconnect switch has excessive voltage drop. Replace battery disconnect switch (WP 0037
j.
Remove test leads from test connector.
k.
Install test connector protective cap.
l.
Connect wire to upper terminal (GND Negative) of engine fuel shutoff solenoid.
3.
Batteries Voltage Test.
NOTE
This test measures TERMINAL voltage of batteries.
a.
Ensure engine is OFF.
b.
Place battery disconnect switch in ON position.
c.
Turn all accessories OFF.
d.
Remove wire from upper terminal (GND Negative) on engine fuel shutoff solenoid.
e.
Remove protective cap from test connector receptacle.
f.
Select VDC on multimeter.
g.
Connect positive (red) lead from multimeter to test connector pin 1.
h.
Connect negative (black) lead from multimeter to test connector pin 7.
CAUTION
DO NOT crank starter motor for more than 30 seconds at a time. After 30 seconds, allow starter motor to
cool for at least two minutes before attempting to start engine again. Excessive heating of starter motor may
result in damage or premature starter failure.
NOTE
During engine cranking, it is normal for battery voltage to go below 23.1 volts. However, if battery voltage
then goes below 12.5 volts, batteries will probably have cranked engine only momentarily.
i.
Using key start switch, crank engine and observe multimeter for an indication of less than 23.1 volts. If indication
is less than 23.1 volts, problem could be:
(1)
A light or accessory was left ON, while machine was shut down, causing batteries to discharge. Recharge
batteries (WP 0067 00) and retest.
(2)
Worn out batteries that will not hold a charge. Replace batteries (WP 0067 00) and retest.
(3)
No alternator output. Replace alternator (WP 0034 00).
j.
Remove test leads from test connector.
k.
Install test connector protective cap.
l.
Connect wire to upper terminal (GND Negative) of engine fuel shutoff solenoid.
0005 00-3
