While Smith Co Electric deems this information accurate, we are not liable for problems arising from use of this information. Always use caution when modifying a system. *This is a basic wiring guide and will not cover every application or scenario. Make sure all connections, including battery ground cable, are clean and tight. Alternator ground connection is the casing, grounding back through bracketing and eventually through battery ground cable. The #1 regulator connection must be off with ignition off to prevent battery drain. The main points to remember are both the #1 and #2 regulator connections are BAT+ with key on. This connection is not necessary for unit to function even if it is present. This is one of the three phase connections and is most commonly used to function electronic tachometers. The third spade connection in this diagram is optional and will not be present on all units. For this diagram we are wiring it right back with the alternators output post which is BAT+ full time. The #2 spade on the alternators regulator connection may be either powered full time, or may be wired to be on/off with ignition - either will work. *For repair harness including diode see part number 9840-4033* Depending on switch circuitry there may also be a diode before the #1 spade to prevent the current when charging from back feeding the ignition switch and not allowing unit shut down. This connection acts as a ground allowing the no charge indicator light to work, until the alternator starts charging - the alternator will then push 12v+ back up towards the indicator light cancelling out the circuit and shutting the light off. With key on power is then transferred through the no charge indicator light to the #1 spade on the alternator regulator connection. The ignition switch is most commonly powered from the starter battery stud, but source may vary depending on application. *This diagram shows the simple wiring diagram for negative ground Delco SI series alternators.* If you are looking for the no charge indicator light on the dash to function as well, this should help determine which connection to use. While this series of unit often runs as a self exciting one wire, agricultural applications also used 3 wire connections to the alternator. An antenna is a straight line with three small lines branching off at its end, much like a real antenna.We are commonly asked how to wire the Delco SI series alternators upon maintenance or upgrading from an older generator. A resistor will be represented with a series of squiggles symbolizing the restriction of current flow. For example, a switch will be a break in the line with a line at an angle to the wire, much like a light switch you can flip on and off. Most symbols used on a wiring diagram look like abstract versions of the real objects they represent. ![]() Select Show Dimensions to show the length of your wires or size of your component.Ĭlick here to read SmartDraw's complete tutorial on how to draw circuit diagrams and other electrical diagrams. You can also change the size and shape of your line hops. You'll be able to search for additional symbols and open any relevant libraries.Ĭlick on Set Line Hops in the SmartPanel to show or hide line hops at crossover points. Delco CDR-500 ( A 4 - +12 V Direct) ( A5 Antenna Output +) ( A6 Ilum. If you need additional symbols, click the arrow next to the visible library to bring up a drop down menu and select More. GM car radio wiring connector audio The factory wire colors given are typical of most GM vehicles. Once connected, it will remain connected even if you move the wire. Drag a symbol onto the line and it will insert itself and snap into place. If you right click on a line, you can change the line's color or thickness and add or remove arrowheads as necessary. To draw a wire, simply click on the Draw Lines option on the left hand side of the drawing area. Special control handles around each symbol allow you to quickly resize or rotate them as necessary. Customize hundreds of electrical symbols and quickly drop them into your wiring diagram. SmartDraw comes with pre-made wiring diagram templates.
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