COUPLING 4391590 - Caterpillar

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) StarterSwitches
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 switchResistors
Illustration 3 g01390734
(AB) Pressure resistor (AC) Temperature resistor (AD) Float resistorWire Coloring
Red ... RDWhite ... WHOrange ... ORYellow ... YLPink ... PKBlack ... BKGray ... GYPurple ... PUBrown ... BRGreen ... GNBlue ... BUWire 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 formatConnectors
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 connectorNote: "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