TM 5-3805-248-23-1
BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0014 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
16. Airhorn Is Inoperative
1.
Check operation of brakes.
1. If parking or service brakes do not
operate correctly, service them first.
2. If parking and service brakes operate
correctly, go to Test 2.
2.
Verify low air pressure warning horn
1. If warning horn always sounds, remove
stops sounding when air pressure
the restriction or replace line and/or
reaches normal.
fitting between the bulk head fitting and
the low air horn pressure switch.
2. If warning horn operates correctly, go to
Test 3.
3.
Check air pressure from air horn
solenoid valve.
a. Run engine and allow air pressure to
reach normal operating range (TM
5-3805-248-10).
b. Loosen air line at solenoid valve
1. If no air escapes, go to Electrical
c. Press airhorn switch (TM 5-3805-
248-10) and listen for air escaping at
Troubleshooting.
line.
2. If air escapes, replace airhorn solenoid
line (WP 0219 00).
3. If problem still exist, replace horn (WP
END OF WORK PACKAGE
