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 200 of 987
TM 9-2320-285-24-1
2-19.
INSTRUMENT PANEL TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
LOW FUEL INDICATOR LAMP LIGHTS WHEN FUEL TANK IS FULL
Step 1.
Check if FUEL gage indicates full.
a.
If FUEL gage does not indicate full, troubleshoot fuel level sender (para 2-21, Malfunction 3).
b.
If FUEL gage indicates full, go to step 2 below.
Step 2.
Check LOW FUEL INDICATOR light and low fuel warning circuit board electrical leads for short in
wiring.
a.
If short in wiring is found, repair (para 2-26b(3)).
b.
If short in wiring is not found, replace low fuel warning circuit board (para 2-26b(3)).
7.
VOLTMETER INOPERATIVE
Step 1.
Check if key switch is turned to off position.
a.
If key switch is off, turn key switch to on position.
b.
If key switch is turned to on position, go to step 2 below.
Step 2.
Disconnect voltmeter electrical leads (para 2-26f).
Apply 12 Vdc power source to voltmeter terminals.
a.
If voltmeter indicates 11-13 Vdc, notify direct support maintenance (wiring).
b.
If voltmeter does not indicate 11-13 Vdc, replace voltmeter (para 2-26f).
8.
AMMETER INOPERATIVE
Step 1.
Check if key switch is turned to off position.
a.
If key switch is off, turn key switch to on position.
b.
If key switch is turned to on position, go to step 2 below.
2-177
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