TM 5-3805-298-23-1
0124
Table 1. One or Both Headlights Do Not Operate - Continued.
0124
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Using digital multimeter
One or Both Headlights Do
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Replace lower cab wiring harness
Not Operate - Continued
between connector HN-C1
(WP 0291).
(WP 0012, Figure 66) terminal 19
Proceed to Test Step 20.
and terminal 13.
Resistance Greater Than 5.0 Ohms
Replace main cab wiring harness
(WP 0293).
Proceed to Test Step 20.
Test Step 13. Test Lighting Fuse
Replacement.
1. Turn battery disconnect switch to
ON position (TM 5-3805-298-10).
2. Observe operation of headlights
Headlights Operate Proceed to Test
(TM 5-3805-298-10).
Step 20.
Headlights Do Not Operate Proceed
to step 3.
3. Turn battery disconnect switch to
OFF position (TM 5-3805-298-10).
4. Remove lighting fuse from fuse
module 1 (WP 0012, Figure 44,
Item 8).
5. Using digital multimeter
Resistance 5.0 Ohms or Less Install
(WP 0174), measure resistance
lighting fuse (WP 0012, Figure 44,
between terminals of lighting fuse.
Item 8).
Proceed to Test Step 7.
Resistance Greater Than 5.0 Ohms
Proceed to Test Step 14.
Test Step 14. Test for Faulty Blackout
1. Remove blackout horn relay
(TM 5-3805-298-10) from fuse
panel.
2. Using digital multimeter
Resistance 288 Ohms to 414 Ohms
(WP 0174), measure resistance
Proceed to step 3.
between blackout horn relay
Resistance Less Than 288 Ohms
(WP 0012, Figure 154) terminal 86
Replace blackout horn relay
and terminal 85.
(TM 5-3805-298-10).
Proceed to Test Step 20.
3. Remove blackout headlight relay
(TM 5-3805-298-10) from fuse
panel.
0124-7
