Mercedes W123 Ignition Switch Wiring Diagram – We will first look at the various types of terminals that are used on the ignition switch. These include the terminals that are for the Ignition switch, Coil, and Accessory. Once we’ve established the purpose of the terminals we will be able to determine the various components of the ignition wiring. In addition, we will discuss the roles of the Ignition switch and Coil. We will then turn our attention towards the accessories terminals.
Terminals for ignition switch
There are three separate switches on an ignition switch that transmit the battery’s current voltage to a variety of places. The first switch powers the choke. The second switch is responsible for the ON/OFF of the ignition switch. Each manufacturer has its unique color-coding system, which we will discuss in another article. OMC utilizes this system. An additional connector is included in the ignition switch for connecting a tachometer.
Although some ignition switch terminals could not be authentic, the numbering of the terminals may not be in line with the diagram. Examine the integrity of the wires first to ensure they are correctly plugged in the ignition switch. This can be checked using a cheap multimeter. After you’re satisfied with the integrity of the wires, install the new connector. If your vehicle has an ignition switch installed, the wiring diagram will differ.
Before you can connect the ACC outputs to the auxiliary outputs of your car it is crucial to be familiar with the fundamentals of these connections. The ACC/IGN terminals function as the default connections on the ignition switch. The START/IGN terminals connect to the radio or stereo. The ignition switch is the one that turns the car’s engine to and off. The terminals of the ignition switch on older vehicles are marked with the letters “ACC” as well as “ST” (for individual magneto wires).
Terminals for coil
To identify the kind of ignition coil, the first step is to understand the terminology. The fundamental diagram of ignition wiring shows a number different connections and terminals. There are two primary and one secondary. Each coil is equipped with a distinct operating voltage. To determine which type of coil you’ve got, the first step is to test the voltage at S1, the primary terminal. S1 should also be tested for resistance in order to identify if it’s an A, Type B or A coil.
The negative end of the chassis should be connected to connect the coil’s low-tension side. This is the ground in the wiring diagram for ignition. The high-tension supply supplies positively directly to spark plugs. It is essential for suppression purposes that the metallic body of the coil is connected to its chassis, however, it is not necessary. The wiring diagram will depict the connection between positive and negative coil terminals. Sometimes, a defective ignition coil is identified with a scan at an auto parts shop.
The black-and-white-striped wire from the harness goes to the negative terminal. The positive terminal receives the white wire, which has an trace of black. The contact breaker is connected to the black wire. If you’re not sure about the connections of both, you can use an old paper clip to take them from the housing of the plug. It is also important to make sure that the terminals don’t bend.
Accessory Terminals
The wiring diagrams for the ignition show the different wires that provide power to the various parts of the car. There are typically four different color-coded terminus for each component. The accessories are red and the battery yellow, the starter solenoid is green. The “IGN” terminal allows you to start your car, operate the wipers, or any other features that operate. The diagram illustrates how to connect ACC or ST terminals and the rest.
The battery is connected to the terminal whose name is BAT. The battery is essential for the electrical system to start. The switch won’t turn on if there is no battery there. To locate your car’s battery, check your wiring diagram. The ignition switch and the battery are connected via accessory terminals. The BAT terminal is connected to the battery.
Certain ignition switches have an accessory position where users can alter their outputs and control them without needing to use the ignition. Some customers want an auxiliary output that can be operated independently of the ignition. In order for the auxiliary output be used, connect the connector with the same color as the ignition. Connect it to the ACC end of the switch. This is a convenient feature however it does have one major difference. The majority of ignition switches are designed to have an ACC status when the car’s in the ACC or START positions.
Gallery of Mercedes W123 Ignition Switch Wiring Diagram
Gallery of Mercedes W123 Ignition Switch Wiring Diagram
