One of the most common problems car owners face is a dead battery. When this happens, you’ll need to test your car’s ignition switch to determine the cause. This guide will show you how to do just that using a voltmeter. If your car has a code P0135, you’ll need to replace the ignition switch. If your car doesn’t have a code, there may be another issue that needs to be fixed. Testing your ignition switch is an important step in repairing or replacing your car. Follow this guide and you’ll be on your way to saving yourself time and money!
What is a Voltmeter?
Voltmeter measures voltage. Voltage is the amount of energy in a current or a flow of electrons. The higher the voltage, the more power is present. You can use a voltmeter to test car ignition switch by checking for continuity between the black and brown wires at the distributor cap. If there is no continuity, your ignition switch may be bad and need to be replaced.
How to Test Car Ignition Switch With Voltmeter
If your car doesn’t start when you try to turn the key, there may be an issue with the ignition switch. You can check this by using a voltmeter. Here’s how:
1. Disable the security system. If your car has a security system, disable it before you start testing the switch.
2. Remove the battery cable. If your car has a battery, remove the cable before you start testing the switch.
3. Disconnect both leads from the voltmeter and connect one lead to each terminal on the ignition switch (the black wire going to battery and red wire going to ground).
4. Turn the key all of the way to the “ON” position and then turn it back to “OFF” . The voltage reading should be 12 volts when connected in this way (positive if connected to positive terminal, negative if connected to negative terminal). If it isn’t, there may be something wrong with either your ignition switch or wiring in your car.
What to Do If the Voltmeter Shows an Open Circuit
If your car’s battery is not getting a good charge, the car’s ignition switch may be the issue. Testing the ignition switch with a voltmeter can confirm if the switch is open or closed. If the voltage is high when the key is turned to the “ON” position, then the switch is most likely open. If the voltage is low when the key is turned to “ON”, then it means that the switch may be closed and needs to be replaced.
What to Do If the Voltmeter Shows a Short Circuit
If you are experiencing a problem with your car’s ignition, one of the first things you should do is check the voltage at your battery posts. A short in the wiring can cause a low voltage, which will not allow your car to start. To test your car’s ignition switch, use a voltmeter. Connect the negative lead to the terminal that is closest to the battery and connect the positive lead to an appropriate ground. Turn your car on and try to start it. If it doesn’t start, there may be a problem with your switch.