SAMPLE SUMMARY TROUBLESHOOTING PROCEDURE

TM 9 2320-209-20-2-1

a. The first box gives you the name of the test equipment procedure. It also

tells you the kind of troubleshooting for which this procedure is used. In this case,

the test equipment procedure is the DC VOLTAGE TEST. This test will be used to

troubleshoot faults in the battery system, the charging system, and voltage drops in

the electrical system.

b. Box

gives you detailed test instructions. Next to the large dot are

instructions telling you what to do. In this example you are told to set up the multi-

meter test leads. Next to the small dots are instructions telling you how to set up

the test leads.

c. The multimeter jack table tells you which jack to plug the red (+) test lead into.

d. The multimeter function table tells you how to set the function/range switch.

SAMPLE SUMMARY TROUBLESHOOTING PROCEDURE. The sample summary

troubleshooting procedure given is the electrical system summary for the problem

"CHARGING SYSTEM CHARGING TOO HIGH OR LOW. "

a. The first box tells you what kinds of problems the summary covers. In this

example, the summary covers charging system problems.

b. The charging system problems you will see on the truck are the fault symptoms

"CHARGING SYSTEM (25 AMP) GENERATOR HAS TOO HIGH OR LOW CHARGING

RATE" , and "CHARGING SYSTEM (60 AMP) ALTERNATOR HAS TOO HIGH OR LOW

CHARGING RATE . "

c. To do the summary procedure for each fault symptom given, you follow

the GO chains to each box. Any notes, cautions, or warnings that are given

in the detailed troubleshooting procedures are also given in the summary.

d. General instructions telling you what to do are given in box

. Detailed

instructions on how to do checks or tests are not given in the summary. If the

answer to the question at the bottom of box A is

, then you do the corrective

action given in box

.If the answer is YES , follow the GO chains to box

and box

and check the parts of the truck given in those boxes. You then repair

or replace the parts that are bad.

e. The note given under the last box in the GO chain means that you should look

at the electrical system fault symptom index. This index will tell you where you can

find the detailed troubleshooting procedure for the symptom "CHARGING SYSTEM

(25 AMP) GENERATOR HAS TOO HIGH OR LOW CHARGING RATE. "