TM 5-3805-298-23-1
0123
Table 1. Blackout Light Does Not Operate - Continued.
0123
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Blackout Light Does Not
Test Step 5. Test for Open Engine
Operate - Continued
Wiring Harness.
1. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
2. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Replace lower cab wiring harness
between connector EN-C2
(WP 0291).
(WP 0012, Figure 12) terminal 16
Proceed to Test Step 12.
and ground.
Resistance Greater Than 5.0 Ohms
Replace engine wiring harness
(WP 0299).
Proceed to Test Step 12.
Test Step 6. Test for Faulty Military
Light Switch.
1. Remove military light switch
(WP 0257).
2. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Replace main cab wiring harness
between military light switch
(WP 0293).
connector (WP 0012, Figure 142)
Proceed to Test Step 12.
terminal D and terminal F.
Resistance Greater Than 5.0 Ohms
Replace military light switch (WP 0257).
Proceed to Test Step 12.
Test Step 7. Test Lighting Fuse
Replacement.
1. Connect connector LE-C22
(WP 0012, Figure 143) to blackout
light.
2. Turn battery disconnect switch to
ON position (TM 5-3805-298-10).
3. Observe operation of blackout light
Blackout Light Operates Proceed to
(TM 5-3805-298-10).
Test Step 12.
Blackout Light Does Not Operate
Remove lighting fuse (WP 0012,
Figure 44, Item 8).
Proceed to Test Step 8.
Test Step 8. Test for Shorted Wiring
Harness.
1. Disconnect connector LE-C22
(WP 0012, Figure 143) from
blackout light.
2. Turn battery disconnect switch
OFF position (TM 5-3805-298-10).
0123-4
