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Page Title:
Table 4. Electrical System Troubleshooting Procedures - Continued. |
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 TM 9-2320-312-24-1
TROUBLESHOOTING PROCEDURES - CONTINUED
0006 00
Table 4. Electrical System Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
INSTRUMENT PANEL GAUGES AND CONTROLS - CONTINUED
4. Tachometer/Hourmeter Inoperative.
1. Ensure "GAUGES" 10A
Reset circuit breaker.
circuit breaker is not tripped.
Replace gauge if damaged.
2. Inspect front and rear of
gauge for signs of damage.
Reconnect harness to gauge as
Ensure harness connector is
required (WP0093 00).
securely connected to gauge
3. Use multimeter to check for
a. If voltage is present at
12Vdc at harness connector.
harness
connector,
replace gauge (WP 0093
b. If voltage is not present,
continue
to
check
instrument panel wiring
for loose or disconnected
wires.
INSTRUMENT PANEL LIGHTS
1. Check Engine
(CHK
ENG.)
Light
1. Ensure "GAUGES" 10A
Reset circuit breaker.
Inoperative.
circuit breaker is not tripped.
Replace light if damaged (WP
2. Inspect front and rear of light
for signs of damage (WP 0093
Reconnect harness connector to
3. Ensure harness connector is
securely connected to light
light as required (WP 0093 00).
4. Use multimeter to check for
a. If voltage is present at
12Vdc at harness connector.
harness
connector,
replace light (WP 0093
b. If voltage is not present,
continue
to
check
instrument panel wiring
for loose or disconnected
wires.
c. Refer
to
engine
troubleshooting in Group
020 Commercial Service
Manuals
for
more
information.
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