TM-9-2320-285-24-1
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-1 - Page 413 of 987
TM 9-2320-285-24-1
2-35.
WIRING HARNESS MAINTENANCE
a.
Cab Harnesses (cont).
(1) Upper Cab Harness (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION/REPAIR (cont)
2
b.
Upper cab
Inspect
Repair if insulation frayed
(cont)
harness (2)
or conductor broken.
Wrap
electrical tape over frayed
insulation.
If broken
conductor is accessible,
cut a length of same gage
wire and splice using in-
sulated splice connector;
if wire is not accessible,
replace harness (notify
direct support maintenance)
TESTING
3
Cab
Upper cab harness
Test
Use multimeter set to X1 ohms
(2)
continuity
range (refer to electrical
system wiring schematic);
refer to step (2) above for
repair of broken conductor
4
Cab,
Connector (1)
Connect
As tagged
inside
5
Cab,
Front instrument
Lower and
Para 2-26g(1)
inside
panel
secure
6
Battery
Battery ground
Connect
Para 2-34a
box
cable
7
Cab
a.
Key switch
Turn on
b.
Lights,
Check
If lights,
controls,
or
controls,
and
operation
indicators do not operate,
indicators
refer to para 2-17 thru
2-23 for troubleshooting
procedures
c.
Key switch
Turn off
2-390
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