TM 5-3805-298-23-2
0135
Table 1. One or Both Rear Work Lights Do Not Operate - Continued.
0135
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Disconnect connector HN-C12
One or Both Rear Work
(WP 0012, Figure 183) from work
Lights Do Not Operate -
light switch (WP 0012,
Continued
Figure 184).
3. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Proceed to Test Step 6.
between work light switch
Resistance Greater Than 5.0 Ohms
(WP 0012, Figure 184) terminal 6
Replace work light switch (WP 0257).
and terminal 5.
Proceed to Test Step 21.
Test Step 6. Test Blackout Flood
Light Relay.
1. Connect connector HN-C12
(WP 0012, Figure 183) to work
light switch (WP 0012,
Figure 184).
2. Swap blackout flood light relay
with blackout horn relay at fuse
panel (TM 5-3805-298-10).
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
4. Observe operation of rear work
Rear Work Lights Operate Swap
lights (TM 5-3805-298-10).
blackout flood light relay back to
blackout horn relay position and replace
blackout flood light relay (TM 5-3805-
298-10).
Proceed to Test Step 21.
Rear Work Lights Do Not Operate
Proceed to Test Step 7.
Test Step 7. Test for Voltage at
Blackout Flood Light Relay.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove blackout flood light relay
from fuse panel (TM 5-3805-298-
10).
3. Turn battery disconnect switch and
ignition switch to 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 Replace
between connector C-C31
lower cab wiring harness (WP 0291).
(WP 0012, Figure 74) terminal A3
Proceed to Test Step 21.
and A2.
0135-4
