TM 5-3805-298-23-1
0122
Table 1. Dome Light Does Not Operate - Continued.
0122
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Dome Light Does Not
Test Step 6. Test Blackout Horn
Operate - Continued
Relay.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Install dome light (TM 5-3805-298-
10).
3. Swap blackout horn relay with
blackout headlight relay at fuse
panel (TM 5-3805-298-10).
4. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
5. Turn dome light switch to ON
position (TM 5-3805-298-10).
6. Observe operation of dome light
Dome Light Operates Swap blackout
(TM 5-3805-298-10).
horn relay back to blackout headlight
relay position and replace blackout horn
relay (TM 5-3805-298-10).
Proceed to Test Step 23.
Dome Light Does Not Operate
Proceed to Test Step 7.
Test Step 7. Test for Voltage at
Blackout Horn Relay.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove blackout horn 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 D2
Proceed to Test Step 23.
and D3.
5. Using digital multimeter
Voltage 18 to 26 V Replace lower cab
(WP 0174), test for voltage
wiring harness (WP 0291).
between connector C-C31
Proceed to Test Step 23.
(WP 0012, Figure 74) terminal D1
Voltage Less Than 18 V Proceed to
and D2.
Test Step 8.
0122-4
