TM 5-3805-298-23-2
0141
Table 1. Horn Does Not Operate - Continued.
0141
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Horn Does Not Operate -
3. Disconnect connector HN-C1
Continued
(WP 0012, Figure 66) from
connector C-C1 (WP 0012,
Figure 65).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Replace main cab wiring harness
between connector C-C1
(WP 0293).
(WP 0012, Figure 65) terminal 13
Proceed to Test Step 24.
and ground.
Resistance Greater Than 5.0 Ohms
Proceed to Test Step 13.
Test Step 13. Test for Open Engine
Wiring Harness.
1. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
2. 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 24.
and ground.
Resistance Greater Than 5.0 Ohms
Replace engine wiring harness
(WP 0299).
Proceed to Test Step 24.
Test Step 14. Test Horn Fuse
Replacement.
1. Connect connector LE-C12
(WP 0012, Figure 204) to Horn.
2. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
3. Turn dome light switch to ON
position (TM 5-3805-298-10).
4. Press horn button
(TM 5-3805-298-10).
5. Listen for operation of horn
Horn Operates Proceed to Test
(TM 5-3805-298-10).
Step 24.
Horn Does Not Does Not Operate
Proceed to step 6.
6. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
7. Remove horn fuse from fuse panel
(TM 5-3805-298-10).
0141-7