TM 5-4220-233-14
Section III. OPERATOR/CREW TROUBLESHOOTING PROCEDURES
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General ............................................................................................. 3-5
3-3.
General.
a.
This section provides information for identifying and correcting malfunctions which may develop while
operating your Servicing Unit.
b.
Before performing troubleshooting, read and follow all safety instructions found in the Warning
Summary at the front of this manual.
c.
This section cannot list all malfunctions/symptoms that may occur, nor all probable causes and
corrective actions. If a malfunction/symptom is not listed, or is not corrected by the listed corrective actions,
notify your supervisor. There are other malfunctions/symptoms that may occur to the Servicing Unit listed in
Table 4-2. These are related to topics that may be found by unit maintenance personnel.
d.
When troubleshooting a malfunction/symptom:
(1)
Find the troubleshooting procedure for the malfunction in question in Table 3-1. Headings at top of
each page show how each troubleshooting procedure is organized: MALFUNCTION/SYMPTOM, PROBABLE
CAUSE (in step number order), and TEST OR INSPECTION/CORRECTIVE ACTION.
(2)
Perform in the order listed until the malfunction is corrected. DO NOT perform any maintenance
task unless the troubleshooting procedure tells you to do so.
e.
The columns in Table 3-1 are defined as follows:
(1)
MALFUNCTION .
A visual or operational indication that something is wrong
with the Servicing Unit.
(2)
PROBABLE CAUSE
A procedure that isolates the problem in a component or
assembly.
(3)
TEST OR INSPECTION/
A procedure to correct the problem.
CORRECTIVE ACTION
Table 3-1. Operator/Crew Troubleshooting.
MALFUNCTION/SYMPTOM
PROBABLE CAUSE
TEST OR INSPECTION/CORRECTIVE ACTION
ELECTRICAL SYSTEM
1.
ALL LAMPS FAIL TO LIGHT .
Towing vehicle lights are turned off.
Refer to towing vehicle technical manual for instructions.
Intervehicular cable does not have proper connection.
Refer to towing vehicle technical manual for instructions.
Towing vehicle circuit breaker/fuse tripped.
Refer to towing vehicle technical manual for instructions.
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