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 425 of 987
TM 9-2320-285-24-1
2-35.
WIRING HARNESS MAINTENANCE (CONT)
c.
Instrument Panel Harnesses (cont).
(1)
Front Panel Harness (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION/REPAIR (cont)
2
f.
Front panel
Inspect: repair if insulation frayed or con-
(cont)
harness (5)
ductor broken.
Wrap electrical tape over
frayed insulation.
If broken conductor is
accessible, cut a length of same gage wire
and splice using insulated splice connec-
tor; if wire is not accessible, replace
harness (notify direct support
maintenance)
TESTING
3
Cab
Front panel
Test continuity: use multimeter set to X1
harness (5)
ohms range (refer to electrical system
wiring schematic); refer to step 2e above
for repair of broken conductor
4
Cab,
a.
Connectors
Connect
As tagged
inside
(1 thru 3)
b.
Fuse block and
Position
In cab firewall
bulkhead con-
nector (4)
c.
Electrical lead
Position
At location noted during
(7)
removal
d.
Two capscrews
Install and
(6)
tighten
e.
Trailer hand
Connect
Para 2-32f(2)
brake stop
wires
light switch
f.
Instrument
Lower and
Para 2-26g(1)
panel
secure
5
Cab fire-
Chassis harness
Connect
Para 2-35d
wall, under
plug
hood
6
Battery
Battery ground
Connect
Para 2-34a
box
cable
7
Cab
a.
Key switch
Turn on
b.
Lights,
Check operation: if lights, controls, or
controls, and
indicators do not operate, refer to para
indicators
2-17 thru 2-23 for troubleshooting
procedures
c.
Key switch
Turn off
2-402
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