TABLE 5-1. TROUBLESHOOTING
TROUBLE
PROBABLE CAUSE
REMEDY
1. Pressure loss in
1.
Leaking fittings or
1. Check tube and fittings
brake system
loose connection
for tightness. Replace-
of damaged fittings.
2.
Cracked tube
2. Replace damaged tubes.
3.
Valve leaking
3. Check drain valve and
relay valve. Replace
damaged valves.
4.
Valve slightly open
4. Close drain valve.
on Air reservoir.
2.
Faulty lamp
1.
Lamp bulb burned
1. Replace bulb.
out or damaged.
2.
Bad ground
2. Reground lamp.
3.
Corroded socket.
3. Clean or replace socket
as necessary.
4.
Faulty lamp connector.
4. Reconnect clean or re-
place as necessary.
5.
Break in wiring circuit
5. Repair wire.
6.
Circuit breaker malfunc-
6. Replace circuit breaker.
tion.
7.
Corroded commercial
7. Clean or replace as
or military connector
required.
8.
Malfunctioning towing
8. Refer to applicable vehi-
vehicle electrical system.
vehicle T.O. or main-
tenance manual as requir-
ed. Possible 12VDC
Military system could be
present.
9.
Electrical box malfunc-
9. Perform continuity
tions.
checks on applicable
resistors , diodes and cir-
cuit breakers . Replace as
required.
3.
Oil leak, wet hubs
1.
Leaking rear oil seal
1. Replace oil seal.
4.
Loose/damaged
1.
Cracks , tears, weld breaks
1. Repair as required.
trailer frame members
trailer Chassis.
5-2
