TM 5-3895-385-23-1
0161
Table 1. Horn Fails To Sound Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) across fuse on light
light horn wiring harness (WP
horn wiring harness (WP 0451,
0394, Vol 2).
Vol 3, Figure 39).
2. If no continuity is present,
replace fuse on light horn wiring
harness (WP 0394, Vol 2).
5. Fuse blown.
1. Access fuse box (WP 0277, Vol
2).
2. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) across horn fuse
to next malfunction.
(WP 0447, Vol 3, Figure 1).
2. If no continuity is present,
replace horn fuse (WP 0277,
Vol 2).
6. Relay malfunction.
1. Access horn relay (WP 0277,
Vol 2).
2. Turn keyless engine switch to
the AUX position (TM 5-3895-
385-10), but do not start engine.
3. Press and hold horn key on
keypad (TM 5-3895-385-10).
4. Measure voltage (WP 0443, Vol
1. If voltage reads a minimum of 22
3) from known good ground to
VDC, replace main wiring
relay connection point 87 (WP
harness (WP 0373, Vol 2).
0447, Vol 3, Figure 4) on horn
relay (WP 0447, Vol 3, Figure 3).
2. If voltage reads below 22 VDC,
proceed to next test.
5. Measure voltage (WP 0443, Vol
1. If voltage reads a minimum of 22
3) from known good ground to
VDC, turn keyless engine switch
relay connection point 30 (WP
to the OFF position (TM 5-3895-
0447, Vol 3, Figure 4) on horn
385-10), and replace horn relay.
relay (WP 0447, Vol 3, Figure 3).
0161-4
