TM-9-2320-260-20
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
APRIL 1995
TM-9-2320-260-20 - Page 187 of 1337
TM 9-2320-260-20
Table 2-4. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 2. Test batteries for voltage.
Step 1. Set multimeter to a range that will measure 24 volts.
Step 2. Touch positive lead of multimeter to contact end of battery terminal for lead 6 at battery.
Step 3. Touch negative lead of multimeter to contact end of battery terminal for lead 68-7 at
frame ground. Voltage should be present.
If voltage is not present, go to test 3.
Test 3. Check continuity of battery cables.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Step 9.
Step 10.
Step 11.
Step 12.
Step 13.
Step 14.
Step 15.
Disconnect all battery cables from all points of contact at batteries (para. 4-48).
Set multimeter to RXl scale.
Touch positive lead of multimeter to contact end of cable 68-7 at frame ground.
Touch negative lead of multimeter to contact end of cable 68-7. Continuity should be
present.
a. Repair or replace battery cable if resistance is greater than
1
ohm (para. 4-48).
b. Repair or replace battery cable if insulation is worn or frayed (para. 4-48).
Touch positive lead of multimeter to contact end of cable 569.
Touch negative lead of multimeter to frame ground. Continuity should be present.
a. Repair or replace battery cable if resistance is greater than 1 ohm (para. 4-48).
b. Repair or replace battery cable if insulation is worn or frayed (para. 4-48).
Touch positive lead of multimeter to contact end of cable 6.
Touch negative lead to multimeter to frame ground. Continuity should be present.
a. Repair or replace battery cable if resistance is greater than 1 ohm (para. 4-48).
b. Repair or replace battery cable if insulation is worn or frayed (para. 4-48).
Touch positive lead of multimeter to contact end of cable 7.
Touch negative lead of multimeter to frame ground. Continuity should be present.
a. Repair or replace battery cable if resistance is greater than 1 ohm (para. 4-48).
b. Repair or replace battery cable if insulation is worn or frayed (para. 4-48).
Touch positive lead of multimeter to contact end of second cable 68-7.
Touch negative lead of multimeter to opposite end of cable 68-7. Continuity should be
present.
Touch positive lead of multimeter to contact end of cable 68.
Touch negative lead of multimeter to opposite end of cable 68. Continuity should be
present.
Repeat steps 13 and 14 for second cable 68.
a. If continuity is present, go to test 4.
b. Repair or replace battery cable if resistance is greater than 1 ohm (para. 4-48).
c. Repair or replace battery cable if insulation is worn or frayed (para 4-48).
Test 4. Check for battery voltage at starter solenoid.
Step 1. Set multimeter to a range that will measure 24 volts.
Step 2. Touch positive lead of multimeter to contact end of battery cable 6 at starter solenoid.
Step 3. Touch negative lead of multimeter to frame ground. Voltage should be present.
If battery voltage is not present, clean starter solenoid connections for cable 6.
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