TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE CRANKS BUT FAILS TO START ABOVE 50°F (18°C) - CONTINUED.
WARNING
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
equipment.
Step 11.
Set multimeter to 20 vdc scale. Connect red test lead to circuit breaker terminal
(1) and black test lead to ground. Check for 11 to 13 vdc on multimeter.
Disconnect test leads.
a. If multimeter does not read 11 to 13 vdc, replace glow plug circuit
breaker (2) (page 2-756).
b. If multimeter reads 11 to 13 vdc, go to step 12.
Step 12.
Open upper instrument panel (page 2-424). Using multimeter to 20 vdc
scale. Connect red test lead to input terminal (3) on rear of GLOW PLUG
ON/OFF switch (4). Check for 11 to 13 vdc on multimeter. Disconnect test
leads.
a. If multimeter does not read 11 to 13 vdc, go to step 13.
b. If multimeter reads 11 to l3vdc, go to step 15.
Step 13.
Disconnect batteries (page 2-424). Inspect 18 wire (5) from GLOW PLUG
ON/OFF switch (4) to glow plug circuit breaker (2) for loose, corroded,
frayed, or broken condition.
a. If 18 wire (5) is loose at glow plug circuit breaker (2), tighten nut
(6) using 3/8-inch open-end wrench.
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