TM 9-2320-289-20
c. General Electrical Troubleshooting Instructions.
(1) Any components that have been removed for testing must be installed again if
they are not defective.
(2) Fuses are identified by amperage in the troubleshooting procedures, as well by as
a number printed on the fuse itself. An easy way to identify fuses is by their color. The following is a
list of fuses and their colors:
Amperage Fuse
Color
5 amps . . . . . . . . . . . . . . . . . . . . . Tan
10 amps . . . . . . . . . . . . . . . . . . . . . . . Red
15 amps . . . . . . . . . . . . . . . . . . . . . . . Light Blue
20 amps . . . . . . . . . . . . . . . . . . Yellow
25 amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... White
30 amps . . . . . . . . . . . . . . . . . . . . . . . Light Green
(3) Many electrical troubleshooting tasks will require that you check for voltage or
continuity through a lead or connector terminal. Leads will be identified by wire color if their location
is unclear. Connector terminals will usually be identified by the leads that connect to the back of
them.
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