E 17 RELAY Basically, an electrically 1. NORMALLY operated switch which CLOSED may be normally closed (1) or open (2). Current flow through a small coil creates a magnetic 2. NORMALLY field which either opens OPEN or closes an attached switch. SPEAKER An electromechanical device which creates sound waves from current flow. SWITCH, MANUAL Open and closes circuits, 1. NORMALLY thereby OPEN stopping (1) or allowing (2) current flow. 2. NORMALLY CLOSED RELAY, DOUBLE THROW A relay which passes current through one set of contacts or the other. RESISTOR An electrical component with a fixed resistance, placed in a circuit to reduce voltage to a specific value.
SWITCH, DOUBLE THROW A switch which continuously passes cureent through one set of contacts or the other. RESISTOR, TAPPED A resistor which supplies two or more different non adjustable resistance values. SWITCH, IGNITION A key operated switch with several positions which allows various circuits, particularly the primary ignition circuit, to become operational. RESISTOR, VARIABLE or RHEOSTAT A controllable resistor with a variable rate of resistance. Also called a potentiometer or rheostat. SENSOR (Thermistor) A resistor which varies its resistance with temperature. SWITCH, WIPER PARK Automatically returns wipers to the stop position when the wiper switch is turned off.
SENSOR, SPEED Uses magnetic impulses to open and close a switch to create a signal for activation of other components. TRANSISTOR A solid state device typically used as an electronic relay; stops or passes current depending on the voltage applied at “base.” SHORT PIN Used to provide an unbroken connection within a juction block. WIRES Wires are always drawn as straight lines (1) NOT on wiring diagrams. CONNECTED Crossed wires (1) without a black dot at the junction are not joined; crossed wires (2) and a black dot or (2) SPLICED octagonal ( ) mark at the juction as spliced (joined) connections.
SOLENOID An electromagnetic coil which forms a magnetic field when current flows, to move a plunger, etc.