What To Know
- A neutral safety switch is a safety device that prevents your car from starting unless it is in neutral or park.
- Connect the positive probe of the multimeter to the terminal on the neutral safety switch that is connected to the ignition switch.
- If the multimeter readings are not as expected, there may be a problem with the neutral safety switch or another component in the starting system.
A faulty neutral safety switch can lead to a host of problems, from starting your car to shifting gears. Testing the switch with a multimeter is a simple and effective way to troubleshoot these issues. In this comprehensive guide, we’ll walk you through the step-by-step process of how to test neutral safety switch with multimeter.
What is a Neutral Safety Switch?
A neutral safety switch is a safety device that prevents your car from starting unless it is in neutral or park. This switch is typically located near the transmission and works by completing an electrical circuit when the transmission is in neutral or park.
Symptoms of a Faulty Neutral Safety Switch
The most common symptom of a faulty neutral safety switch is that your car will not start when it is in gear. Other symptoms can include:
- Car starts in neutral but not in park
- Car stalls when shifting into gear
- Cruise control does not work
- Reverse lights do not work
Tools and Materials You’ll Need
Before you begin testing the neutral safety switch, you will need the following tools and materials:
- Multimeter
- Socket wrench or adjustable wrench
- Screwdriver
- Electrical tape
Step-by-Step Instructions on How to Test Neutral Safety Switch with Multimeter
1. Safety First
Always disconnect the negative battery terminal before working on any electrical components.
2. Locate the Neutral Safety Switch
The neutral safety switch is typically located on the transmission. It is a small, cylindrical device with several wires connected to it.
3. Disconnect the Electrical Connector
Use a screwdriver to disconnect the electrical connector from the neutral safety switch.
4. Set the Multimeter to Voltage Mode
Set your multimeter to the voltage mode. The voltage range should be set to 12 volts or higher.
5. Connect the Multimeter to the Switch
Connect the positive probe of the multimeter to the terminal on the neutral safety switch that is connected to the ignition switch. Connect the negative probe of the multimeter to the ground terminal on the switch.
6. Shift the Transmission
Shift the transmission into neutral. The multimeter should read 12 volts.
7. Shift the Transmission into Gear
Shift the transmission into gear. The multimeter should read 0 volts.
8. Reassemble the Switch and Reconnect the Battery
If the multimeter readings are as expected, reassemble the neutral safety switch and reconnect the battery.
Troubleshooting
If the multimeter readings are not as expected, there may be a problem with the neutral safety switch or another component in the starting system. Here are some troubleshooting tips:
- Check the wiring to the neutral safety switch. Make sure that the wires are not damaged or loose.
- Check the ignition switch. The ignition switch may be faulty and not sending power to the neutral safety switch.
- Check the starter solenoid. The starter solenoid may be faulty and not engaging the starter motor.
Wrapping Up
Testing the neutral safety switch with a multimeter is a simple and effective way to troubleshoot starting problems. By following the steps outlined in this guide, you can quickly and easily determine if the switch is faulty and needs to be replaced.
Don’t Be Left in the Neutral: Additional Tips
- If you are not comfortable testing the neutral safety switch yourself, you can take your car to a mechanic.
- Replacing a neutral safety switch is a relatively simple repair. However, it is important to follow the manufacturer’s instructions carefully.
- A faulty neutral safety switch can be a safety hazard. If you suspect that your switch is faulty, have it tested and replaced as soon as possible.
Answers to Your Most Common Questions
Q: Can I test a neutral safety switch without a multimeter?
A: Yes, you can test a neutral safety switch without a multimeter. However, this method is not as accurate or reliable as using a multimeter.
Q: What are the symptoms of a faulty neutral safety switch?
A: The most common symptoms of a faulty neutral safety switch are:
- Car will not start when it is in gear
- Car stalls when shifting into gear
- Cruise control does not work
- Reverse lights do not work
Q: How much does it cost to replace a neutral safety switch?
A: The cost to replace a neutral safety switch varies depending on the make and model of your car. However, the average cost is between $100 and $200.
