ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
1. ENGINE CRANKS BUT FAILS TO START BELOW 50°F (18°C) - CONTINUED.
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
Check 18A-12 wire (1) as follows: Disconnect batteries (page 2-424). Open
left side hood panel (page 2-424). Unscrew and take out two wing screws (2)
and take off junction box cover (3). Using 3/8-inch open-end wrench, unscrew
and take off nut (4) and 18A-12 wire (1). Pull wire connector (5) off output
terminal (6) on GLOW PLUG ON/OFF switch (7). Set multimeter to ohms scale
adjust to 0 ohms. With assistant, connect red test lead to wire terminal (8) and
black test lead to wire connector (5). Check for 0 ohms on multimeter.
Disconnect test leads.
a. If multimeter reads no continuity, 18A-12 wire (1) must be replaced.
Notify Direct Support Maintenance.
b. If multimeter reads 0 ohms, push wire connector (5) on to output
terminal (6) on GLOW PLUG ON/OFF switch (7). Place wire terminal
(8) in position and screw nut (4) on to terminal stud (9) on junction
block (10) and tighten using 3/8-inch open-end wrench.