PLATE-WEAR 1895187 - Caterpillar

The block diagram of the electrical system shows which components work together. It does not attempt to show all components. For instance, the turn signals and the stop lamps are each shown as only one box, rather than four for the turn signals and two for the stop lamps. Nor does it try to show all wires. It does show, for instance, that the circulating fan gets power from the same fuse that supplies the rear wiper motor. It also shows that the service meter, the bucket positioner switch and the engine oil pressure lamp all connect to the engine oil pressure switch and therefore are probably controlled by it. If there are more than one seemingly unrelated problems, the block diagram can easily show if there is actually some relation between them. For more specific information on a particular circuit, refer to the simplified schematics in this manual or to the Vehicle Electrical Schematic SENR3165. Codes And Abbreviations
Use the table that follows for identification of wire colors in the simplified electrical schematics. The three digit number that precedes the color specifies the circuit (325-PK). There is a table of codes, colors and circuits on the full vehicle electrical schematic. If there is a two digit number that follows the color, it tells the gauge of that specific wire (325-PK-14). The gauge of the wire is 16 if there is no two digit number.Conventions Used On Individual (Simplified) Schematics