TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE CRANKS BUT FAILS TO START BELOW 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 14.
Test 18 wire as follows: Set multimeter to ohms scale and adjust to O ohms.
Connect red test lead to wire terminal (1) and black test lead to wire connector
(2). Check for 0 ohms on multimeter. Disconnect test leads.
a. If multimeter reads no continuity, 18 wire (3) must be replaced.
Notify Direct Support Maintenance.
b. If multimeter reads 0 ohms, push wire connector (2) on to input
terminal (4) and rear of GLOW PLUG ON/OFF switch (5). Place wire
terminal (1) in position and screw nut (6) on to glow plug circuit
breaker terminal (7) and tighten using 3/8-inch open-end wrench.
Connect batteries (page 2-424) and go to step 15.
Step 15.
Check GLOW PLUG ON/OFF switch (5) as follows: Set multimeter to 20 vdc
scale. Connect red test lead to output terminal (8) on rear of GLOW PLUG
ON/OFF switch (5) and black test lead to ground. Press GLOW PLUG ON/OFF
switch (5) to ON position. Check for 11 to 13 vdc on multimeter. Push GLOW
PLUG ON/OFF switch (5) to OFF position. Disconnect test leads.
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