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 -
Test Step 10. Test for Open Lower
Continued
Cab Wiring Harness.
1. Remove right lower cab access
panels (WP 0347).
2. Disconnect connector HN-C1
(WP 0012, Figure 66) from
connector C-C1 (WP 0012,
Figure 65).
3. Install a jumper wire between
terminal D1 and terminal D2 of
connector C-C31 (WP 0012,
Figure 74).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Replace main cab dash wiring harness
between connector C-C1
(WP 0293).
(WP 0012, Figure 65) terminal 14
Proceed to Test Step 24.
and ground.
Resistance Greater Than 5.0 Ohms
Replace lower cab wiring harness
(WP 0291).
Proceed to Test Step 24.
Test Step 11. Test for Open Lighting
Fuse.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove left engine access panel
(WP 0350).
3. Remove lighting fuse from fuse
module 1 (WP 0012, Figure 44,
Item 8).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0174), measure resistance
Proceed to Test Step 12.
between terminals of lighting fuse.
Resistance Greater Than 5.0 Ohms
Replace lighting fuse (WP 0012,
Figure 44, Item 8) and proceed to Test
Step 18.
Test Step 12. Test for Open Wiring
Harness.
1. Install a jumper wire between
terminal 11 and ground of
connector fuse module 1
(WP 0012, Figure 44).
2. Remove right lower cab access
panels (WP 0347).
0141-6
