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 21. Test for Shorted Main
Continued
Cab Wiring Harness.
1. Disconnect connector HN-C1
(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 24.
(WP 0012, Figure 66) terminal 14
No Continuity Replace lower cab
and ground.
wiring harness (WP 0291).
Proceed to Test Step 24.
Test Step 22. Test for Shorted Wiring
Harness.
1. Disconnect connector HN-C1
(WP 0012, Figure 66) from
connector C-C1 (WP 0012, Figure
65).
2. Using digital multimeter
Continuity Proceed to Test Step 23.
(WP 0174), test for continuity
No Continuity Replace main cab
between connector C-C1
wiring harness (WP 0293).
(WP 0012, Figure 65) terminal 13
Proceed to Test Step 24.
and ground.
Test Step 23. Test for Shorted Engine
Wiring Harness.
1. Remove right lower cab access
panels (WP 0347).
2. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
3. Using digital multimeter
Continuity Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C2
Proceed to Test Step 24.
(WP 0012, Figure 12) terminal 16
No Continuity Replace lower cab
and ground.
wiring harness (WP 0291).
Proceed to Test Step 24.
Test Step 24. Verify Malfunction Is
Resolved.
1. Ensure all harness connectors are
connected.
2. Install right lower cab access
panels (WP 0347).
3. Install instrument cluster
(WP 0252).
0141-11