TM 10-3930-641-20
ELECTRICAL SYSTEM TROUBLESHOOTING
GENERAL
This section contains troubleshooting information for isolating most electrical problems to an individual circuit and in most cases to an individual
component. Replacement of the component is, in most cases, referenced to another section unless only basic knowledge is required to perform the
task.
This manual cannot cover all possible problems, however, the most likely to occur ue mentioned. In general, a switch or sending unit is more likely to
be defective than a gage or indicator. The least likely cause of a problem would be in the wires or harnesses.
TROUBLESHOOTING
To use the QUICK GUIDE (pages 2-71 through 2-73): determine which system, engine, alternator, etc., the PROBLEM occurs in, then go down list
of PROBLEMS until problem is found. Refer to page under REFERENCE column. Read QUESTION for each STEP. If answer to QUESTION is YES,
go to STEP number shown under YES; if answer is NO, go to STEP number shown under NO.
