Lawn Mower 5 Prong Ignition Switch Wiring Diagram

The ignition switch in a lawn mower is an essential component for controlling the engine. It is responsible for sending current to the starter motor and spark plugs, and helps control the various safety features associated with the lawn mower. The ignition switch is made up of five prongs, each responsible for a different purpose. In order to keep your lawn mower's engine running without any issues, it's important to know what each of the five prongs are used for and how to test and replace a faulty ignition switch.

What Are the Five Prongs in the Ignition Switch Used For?

The five prongs that make up an ignition switch are labeled S, I, B, R, and G. S stands for start, I stands for Igniter, B stands for Battery, R stands for Resistor, and G stands for grounding. The start prong is responsible for sending current to the starter motor when the switch is turned to the "On" position. The Igniter prong sends current to the spark plugs in order to ignite the fuel/air mixture in the engine. The Battery prong supplies power to the mower's battery and provides a permanent power source for the ignition system. The Resistor prong controls the flow of current from the battery to the starter motor and spark plugs. Finally, the Grounding prong is responsible for connecting the ignition switch to the frame of the mower.

What Are the Colors of the Wires Connected to the Five Prongs?

The wires connected to the five prongs of the ignition switch are typically color-coded. For most lawn mowers, the Start prong will have a red wire connected to it, the Igniter prong will have a white wire, the Battery prong will have a black wire, the Resistor prong will have a yellow wire, and the Grounding prong will have a green wire. However, it's important to check the wiring diagram of your specific lawn mower model to ensure you have the correct colors.

How Do I Test the Ignition Switch Using a Multimeter?

Testing the ignition switch with a multimeter is a simple process. First, make sure the mower's battery is properly charged and the engine is off. Next, attach the black lead of the multimeter to the negative terminal on the battery and the red lead to one of the prongs on the ignition switch. Set the multimeter to the Ohm setting and turn the ignition switch to the "On" position. If the multimeter displays a reading of "0" then the ignition switch is working properly. However, if the multimeter displays a reading of "1" or higher, then the ignition switch is faulty and needs to be replaced.

What Are the Common Problems with a Faulty Ignition Switch?

A faulty ignition switch can cause several problems with the lawn mower. Some of the most common symptoms of a bad switch include the engine not starting or stalling, the engine not staying running, and the battery draining quickly. Additionally, a faulty switch can also cause the lawn mower's safety features to become disabled. This can be dangerous as it means the blades may not stop spinning when the switch is turned off.

How Do I Replace a Faulty Ignition Switch in a Lawn Mower?

Replacing a faulty ignition switch in a lawn mower is relatively easy. First, make sure the mower's battery is disconnected and the engine is off. Then locate the two screws securing the switch to the frame of the mower and unscrew them. Once the screws are removed, carefully pull the old switch out of the mower and disconnect the wires. Then attach the wires to the new switch, reconnect the battery and test the switch before securing it back to the mower with the two screws.

Are Ignition Switches Universal for All Lawn Mowers?

No, ignition switches are not universal for all lawn mowers. Different models and brands of mowers use different types of switches. Additionally, the wiring systems for these switches vary from model to model. It's important to consult the wiring diagram of your specific mower model before buying and installing a new ignition switch.

Can I Bypass the Ignition Switch in a Lawn Mower?

Yes, it's possible to bypass the ignition switch in a lawn mower. This is done by disconnecting the wires connected to the switch and connecting them directly to the battery. While this may seem like a good idea, it's important to keep in mind that bypassing the switch will disable the safety features associated with the mower and may be dangerous.

Can a Bad Ignition Switch Drain the Battery of a Lawn Mower?

Yes, a bad ignition switch can drain the battery of a lawn mower. This is because the switch is responsible for controlling the flow of current from the battery to the starter motor and spark plugs. If the switch is faulty, it may allow too much current to pass through, resulting in the battery being drained quickly.

How Do I Disable the Safety Features Associated With the Ignition Switch?

In order to disable the safety features associated with the ignition switch, you will need to bypass the switch. This involves disconnecting the wires connected to the switch and connecting them directly to the battery. However, it's important to note that disabling the safety features may be dangerous and is not recommended.