CASE 9W5358 - Caterpillar

FUSEA component in an electrical circuit that will break (open) the circuit (make a not complete circuit) if too much current goes through it. A fuse is destroyed when it breaks a circuit.GROUNDTo be connected to the negative (-) side of a battery; can be connected with a wire and/or the metal of the vehicle. When the negative (-) side of the battery is connected to the vehicle, the metal of the vehicle is at ground potential. External GroundA component has an external ground when it has a wire fastened to a connection on the component that is connected to ground [to the negative (-) side of the battery or to the metal of the vehicle]. Internal GroundA component has an internal ground when it is connected to ground because it is in contact with the metal of the vehicle. It does not have a wire that is fastened to a connection on the component and to ground.GROUNDED WIREWire that is in contact with the metal of the vehicle (ground). It can be because of a loss of insulation from the wire, or because the end of the wire is connected to the vehicle.HARNESSAn assembly made of a few, or many wires that is held together by a cover.INDICATORA lamp or LED that gives an indication of some vehicle condition, when it turns on or flashes.INSULATORSomething that has the characteristics of insulation. A material that has a very large resistance so that it will not let current flow through it (conduct).MAGNETA material that has lines of force around it that attracts (pulls) iron to it.MAGNETIC FIELDThe lines of force around a magnet or an electromagnet that causes iron to be pulled to it. MAGNETIC SWITCHA relay.NEGATIVEThe (-) side of a battery. The direction to which current flows. When the negative side of the battery is connected to the metal of the vehicle, the vehicle is negative, or ground.NORMAL CONDITIONWords used with a switch or relay. Their normal condition is their condition when they are not controlled by the application of force, temperature, pressure, or electricity (Some switches do not have a normal condition.). NORMALLY CLOSED (N.C.)A switch or relay whose normal condition is closed. NORMALLY OPEN (N.O.)A switch or relay whose normal condition is open.OHM (Ohms)The unit of measurement of resistance. The amount of resistance that will let one volt push only one ampere of current through it. PINThe male contact of a connector that fits into a female contact (socket) of another connector. PLUGA male type connector. The plug fits into the female type connector (receptacle).POSITIVEThe (+) side of a battery. At a higher potential than ground. The direction from which current flows.POTENTIALThe value of voltage in relation to ground, or the difference in voltage between two points.POWERThe ability to do work or make heat. The amount of current flow in amperes multiplied by the voltage in volts. Amperes multiplied by volts gives power in watts.PULSECurrent flow for a short time. RECEPTACLEA female type