The ignition system of a vehicle is a crucial component that makes it run. The ignition switch is responsible for transmitting the electrical signal from the battery to the starter motor, which initiates the engine’s combustion process. In this article, we will be discussing the ignition switch wiring diagram for the 1979 Ford F100 model.
What is an Ignition Switch Wiring Diagram?
Before diving into the wiring diagram of the ignition switch, let us first understand what it is. An ignition switch wiring diagram is a schematic representation of the electrical connections and functions of the ignition switch. It helps the mechanic or the vehicle owner to understand the wiring diagram and diagnose any issues related to the ignition system.
What Does an Ignition Switch Do?
The ignition switch is a mechanical device that transfers the electrical signal from the battery to the starter motor. The ignition switch has four positions- Off, Accessory, On, and Start. When the key is turned to the On position, it activates the primary ignition circuit, which sends a signal to the ignition coil to energize the spark plugs. When the key is turned to the Start position, it initiates the engine’s combustion process.
Components of the Ignition System
The ignition system of the 1979 Ford F100 includes several components that work together to start the engine. These include the battery, ignition switch, starter solenoid, ignition coil, distributor, spark plugs, and spark plug wires.
Ignition Switch Wiring Diagram for 1979 Ford F100
The wiring diagram for the ignition switch of the 1979 Ford F100 is as follows:
| Wire Color | Function |
|---|---|
| Red/Light Green | Battery Feed |
| Purple/Yellow | Accessory Feed |
| Green/Red | Ignition Feed |
| Yellow/Red | Starter Motor Feed |
The ignition switch has four terminals, and each wire is connected to a specific terminal. The red/light green wire is connected to the battery feed terminal, the purple/yellow wire is connected to the accessory feed terminal, the green/red wire is connected to the ignition feed terminal, and the yellow/red wire is connected to the starter motor feed terminal.
Wire Color Codes
The wire color codes used in the 1979 Ford F100 ignition switch wiring diagram are as follows:
| Wire Color | Function |
|---|---|
| Red/Light Green | Battery Feed |
| Purple/Yellow | Accessory Feed |
| Green/Red | Ignition Feed |
| Yellow/Red | Starter Motor Feed |
Step-by-Step Guide to Ignition Switch Wiring
The following is a step-by-step guide to wiring the ignition switch on a 1979 Ford F100:
Step 1: Disconnect the Battery
Before starting any work on the ignition system, it is essential to disconnect the battery. This ensures that there is no power flowing through the wires and prevents any electrical shocks.
Step 2: Remove the Old Ignition Switch
The old ignition switch must be removed from the vehicle before wiring the new one. This involves disconnecting the wires from the old switch and removing it from the steering column.
Step 3: Wire the New Ignition Switch
The new ignition switch must be wired according to the wiring diagram. Each wire must be connected to its respective terminal on the switch. Once all the wires are connected, the switch must be secured in place on the steering column.
Step 4: Reconnect the Battery
After the new ignition switch has been wired and secured in place, the battery must be reconnected. This completes the installation process, and the ignition system should now function correctly.
Conclusion
The ignition switch wiring diagram for the 1979 Ford F100 is a crucial tool for understanding the electrical connections and functions of the ignition system. It helps vehicle owners and mechanics diagnose any issues related to the ignition switch and make necessary repairs. By following the step-by-step guide provided in this article, you can wire a new ignition switch and ensure that your vehicle’s ignition system functions correctly.
FAQ
What is the ignition switch wiring diagram?
The ignition switch wiring diagram is a schematic representation of the electrical connections and functions of the ignition switch. It helps the mechanic or the vehicle owner to understand the wiring diagram and diagnose any issues related to the ignition system.
What components make up the 1979 Ford F100 ignition system?
The ignition system of the 1979 Ford F100 includes several components that work together to start the engine. These include the battery, ignition switch, starter solenoid, ignition coil, distributor, spark plugs, and spark plug wires.
What wire color codes are used in the 1979 Ford F100 ignition switch wiring diagram?
The wire color codes used in the 1979 Ford F100 ignition switch wiring diagram are red/light green for the battery feed, purple/yellow for the accessory feed, green/red for the ignition feed, and yellow/red for the starter motor feed.
What is the step-by-step guide to wiring the ignition switch on a 1979 Ford F100?
The step-by-step guide to wiring the ignition switch on a 1979 Ford F100 involves disconnecting the battery, removing the old ignition switch, wiring the new ignition switch according to the wiring diagram, securing the new switch in place on the steering column, and reconnecting the battery.
