If an ignition switch were to fail at its first keystroke position, one could expect to experience a lack of accessory drive function. This is one of the most common symptoms related to ignition switch failure, although such issues are often misdiagnosed as a bad starter. Without this signal, no energization of the starter will occur. When failed in this manner, an ignition switch is unable to distribute voltage to the vehicle’s starting solenoid, via the circuit’s exciter wire. In this case, no audible noise will be heard from the vehicle’s starter. This is most commonly characterized by a lack of response from the engine’s starter when the key switch is turned all the way over. When an ignition switch experiences a failure in the “Crank” position, it can be impossible to start your vehicle. However, in reality, the ignition switch itself has actually experienced a failure in its “On” position.Īs a result, the supply voltage is provided to the ignition system and fuel pump when switched to the “Crank” position but drops this voltage as soon as cranking is complete. Many motorists overlook stalling as a symptom of an ignition switch failure, due to the fact that their vehicle started as intended when commanded to do so by the switch. Stalling is most often experienced while cruising or within seconds of startup. When this occurs, it can be quite difficult for an aging ignition switch to supply the proper amperage and voltage required for proper circuit operation, on a consistent basis. The electrical contacts found within a vehicle’s ignition switch have a tendency to wear with time. The following are the 5 most common symptoms associated with a bad or failing ignition switch. The first step to eliminating your ignition switch woes is to recognize the telltale signs of such a failure. Bad Ignition Switch SymptomsĪs previously mentioned, a bad or failing ignition switch can produce a broad range of symptoms, many of which can prove puzzling to the average motorist. As the vehicle’s engine turns over, the driver returns their key to the ignition switch’s second position. The second position supplies voltage to the vehicle’s fuel and ignition systems.įinally, the third and final keystroke position engages the starter by charging the ignition circuit’s exciter wire. The first of these three positions generally provide power to a vehicle’s electrical systems. A vehicle’s ignition switch is fed direct supply voltage from a vehicle’s battery, which is then distributed to various circuits as each keystroke position is reached.Īn ignition switch generally features three individual keystroke positions. How to Bypass the Ignition Switch to Start a CarĪn ignition switch is directly responsible for distributing voltage as required for vehicle starting, as a motorist turns their ignition key.
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