TM 5-3805-298-23-1
0124
Table 1. One or Both Headlights Do Not Operate - Continued.
0124
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
One or Both Headlights Do
Test Step 8. Test for Voltage at
Not Operate - Continued
Blackout Headlight Relay.
1. Turn battery disconnect switch to
OFF position (TM 5-3805-298-10).
2. Remove blackout headlight relay
from fuse panel (TM 5-3805-298-
10).
3. Turn battery disconnect switch ON
position (TM 5-3805-298-10).
4. Using digital multimeter
Voltage 18 to 26 V Proceed to step 5.
(WP 0174), test for voltage
Voltage Less Than 18 V Proceed to
between connector C-C31
Test Step 9.
(WP 0012, Figure 74) terminal E3
and E2.
5. Using digital multimeter
Voltage 18 to 26 V Install blackout
(WP 0174), test for voltage
headlight relay to fuse panel (TM 5-
between connector C-C31
3805-298-10).
(WP 0012, Figure 74) terminal E1
Proceed to Test Step 10.
and E2.
Voltage Less Than 18 V Proceed to
Test Step 11.
Test Step 9. Test for Open Engine
Wiring Harness.
1. Turn battery disconnect switch to
OFF position (TM 5-3805-298-10).
2. Remove right lower cab access
panels (WP 0347).
3. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
4. Remove lighting fuse from fuse
module 1 (WP 0012, Figure 44,
Item 8).
5. Install a jumper wire between
terminal 11 and ground of
connector fuse module 1
(WP 0012, Figure 44).
6. 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 20.
and ground.
Resistance Greater Than 5.0 Ohms
Replace engine wiring harness
(WP 0299).
Proceed to Test Step 20.
0124-5