TM 5-3805-298-23-2
0134
Table 1. One or Both Front Work Lights Do Not Operate - Continued.
0134
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 26. Test for Shorted Main
One or Both Front Work
Cab Wiring Harness.
Lights Do Not Operate -
1. Disconnect connector HN-C1
Continued
(WP 0012, Figure 66) from
connector C-C1 (WP 0012,
Figure 65).
2. Using digital multimeter
Continuity Replace main cab wiring
(WP 0174), test for continuity
harness (WP 0293).
between connector HN-C1
Proceed to Test Step 31.
(WP 0012, Figure 66) terminal 24
No Continuity Replace lower cab
and ground.
wiring harness (WP 0291).
Proceed to Test Step 31.
Test Step 27. Test Lighting Fuse
Replacement.
1. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
2. Observe operation of front work
Front Work Lights Operate Proceed
lights (TM 5-3805-298-10).
to Test Step 31.
Front Work Lights Do Not Operate
Proceed to step 3.
3. Turn ignition switch and 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) and proceed to Test Step 31.
Resistance Greater Than 5.0 Ohms
Proceed to Test Step 28.
Test Step 28. 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 31.
0134-12
