TM 9-2320-289-20
(3) Symbols. Major items appearing in wiring diagrams and schematics are labeled.
Other items that may require explanation are defined below:
A. Wiring Harness Terminals, Will be found In “mirror image” locations on the wiring harness
male/female connector (F), The circuit through lead 3 RED-2J (SXL) is shown at points marked
“(A).” Note that only terminals for the applicable circuit wiII be shown on the wiring diagram.
Terminals shown on other wiring diagrams will be represented by empty blocks on the wiring
harness connectors.
B.
c.
Splice. Indicates where a lead Is soldered or otherwise connected to 1 or more other leads,
Repair any broken soldered splice using soldering gun.
Wiring Harness, Can be Identified on a wiring diagram by a large number of leads going In the
same direction. Wiring harnesses can be identified on the truck by a conduit (plastic sleeve) or a
loom (string mesh) that wraps around the leads. The leads of each wiring harness are exposed
at the base of the connectors.
D.
E.
F.
Leads and Connectors, Transmit electricity to major components, When disconnecting more
than one lead and connector from a major component, tag leads and connectors for installation.
Ground Lead. Connects to frame or body to complete electrical circuit, A disconnected or
damaged ground lead can make a major component inoperative, or operative at lower
efficiency.
Wiring Harness Male/Female Connectors, Are shown on the wiring diagram according to
their actual shape. Anywhere that a female connector appears, the “mirror image” shown
opposite It will be its male connector.
TA49631
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