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 7.
Remove instrument panel pad (page 2-424). Set multimeter to 20 vdc scale.
Connect red test lead to glow plug circuit breaker stud (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, go to step 8.
b. If multimeter reads 11 to 13 vdc, go to step 11.
Step 8.
Set multimeter to 20 vdc scale. Connect red test lead to circuit breaker strip feed
stud (2) 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, go to step 10.
b. If multimeter reads 11 to 13 vdc, go to step 9.
Step 9.
Check circuit breaker stud (1) for loose condition.
If circuit breaker is loose, disconnect batteries (page 2-424). Using
3/8-inch open-end wrench, tighten nut (3). Connect batteries (page
2-424) and go to step 11.
Step 10.
Test 8 wire (4) as follows: Disconnect batteries (page 2-424). Using 1/2-
inch open-end wrench, unscrew and take off nut (5) and 8 wire (4). Set
multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to wire
terminal (6) and black test lead to terminal (7) on magnetic switch (8). Check
for 0 ohms on multimeter. Disconnect test leads.
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