Fluid Power and Electrical Graphic Symbols Electrical Power Graphic Symbols Caterpillar

Note: Use this module as a basic reference guide for graphic symbols. Do not use this module as a comprehensive reference guide.

Basic Component Symbols

Illustration 1	g01390407
(A) Solenoid (B) Motor (C) Battery (D) Exterior light (E) Circuit breaker (F) Fuse (G) Backlight (H) Potentiometer (J) Ground (K) Resistor (L) Alternator (M) Gauge (N) Normally open relay (P) Normally closed relay (R) Starter

Switches

Illustration 2	g01390733
(S) Disconnect switch (T) Normally open temperature switch (U) Normally closed temperature switch (V) Pressure switch (W) Normally open pressure switch (X) Normally closed pressure switch (Y) Toggle switch (Z) Flow switch (AA) Key switch

Resistors

Illustration 3	g01390734
(AB) Pressure resistor (AC) Temperature resistor (AD) Float resistor

Wire Coloring

Red ... RD

White ... WH

Orange ... OR

Yellow ... YL

Pink ... PK

Black ... BK

Gray ... GY

Purple ... PU

Brown ... BR

Green ... GN

Blue ... BU

Wire Identification

Illustration 4	g01409811
Old format (AE) Wire label (AF) Color code (AG) Wire size

Illustration 5	g01409813
New format (AE) Wire label (AF) Color code (AG) Wire size (AH) Wire number 5 in harness "H"

Components

Illustration 6	g01409816
Old format

Illustration 7	g01409817
New format

Connectors

Illustration 8	g03212180
Old format (AJ) Connector label (AK) Receptacle side of connector (AL) Plug side of connector

Illustration 9	g03212181
New format (AJ) Connector label (AK) Receptacle side of connector (AL) Plug side of connector

Note: "H" is the harness identification, "C" stands for the connector, and "P/N" is the receptacle connector part number.

Splices

Illustration 10	g03212377
Old format (AM) Splice

Illustration 11	g03212379
New format (AM) Splice (AN) Side 2 of the splice (AP) Side 1 of the splice