If you are looking for a wiring diagram for a 1968 John Deere 4020 tractor, you have come to the right place. In this article, we will provide you with all the information you need to properly wire your tractor’s starter. We understand that wiring can be complicated, so we will explain everything step by step in relaxed English language. We will also provide you with tables and FAQs to make it easier for you to follow along.
Overview of Wiring Diagram
The starter wiring diagram for a 1968 John Deere 4020 tractor is relatively straightforward. It consists of a battery, starter solenoid, starter motor, ignition switch, and a wiring harness. The wiring harness connects all the components together to provide power to the starter motor, which turns the engine over.
Battery
The battery is the heart of the electrical system for your John Deere 4020 tractor. It provides power to the starter motor and all the other electrical components on the tractor. The battery must be properly maintained for the electrical system to function properly. Make sure the battery is fully charged and the terminals are clean and tight.
It is recommended to use a 12-volt battery with a minimum of 650 cold-cranking amps for your John Deere 4020 tractor.
Starter Solenoid
The starter solenoid is a small relay that is located on the starter motor. It provides power to the starter motor when the ignition switch is turned to the start position. The solenoid has two connections; one from the battery and one to the starter motor. When the ignition switch is turned to the start position, the solenoid closes the circuit, allowing power to flow to the starter motor.
Starter Motor
The starter motor is responsible for turning the engine over. It is a powerful electric motor that requires a lot of current to operate. If the starter motor is not working properly, your tractor will not start. It is important to properly maintain your starter motor to ensure it continues to function properly.
Ignition Switch
The ignition switch is located on the dashboard of your John Deere 4020 tractor. It controls the power to the starter solenoid and the rest of the electrical system on the tractor. When the ignition switch is turned to the start position, it sends a signal to the starter solenoid, which then provides power to the starter motor.
Wiring Harness
The wiring harness connects all the components together to provide power to the starter motor. It is important to ensure that the wiring harness is properly connected and in good condition. Any damaged wires or connections can cause electrical problems on your tractor.
Step by Step Wiring Instructions
Now that you have a basic understanding of the wiring diagram for your 1968 John Deere 4020 tractor, let’s go over the step by step wiring instructions. We have broken down the process into easy to follow steps.
Step 1: Disconnect the Battery
The first step in wiring your tractor’s starter is to disconnect the battery. This ensures that there is no power running through the electrical system while you are working on it. Disconnect the negative (-) cable first, followed by the positive (+) cable.
Step 2: Locate the Starter Solenoid
The starter solenoid is located on the starter motor. It is a small relay that has two connections. One connection goes to the battery and the other goes to the starter motor.
Step 3: Connect the Battery Cable to the Starter Solenoid
Connect the positive (+) battery cable to the starter solenoid’s connection that goes to the battery. Tighten the connection securely.
Step 4: Connect the Starter Cable to the Starter Solenoid
Connect the other cable, which runs to the starter motor, to the starter solenoid’s connection that goes to the starter motor. Tighten the connection securely.
Step 5: Connect the Wiring Harness to the Starter Solenoid
Connect the wiring harness to the starter solenoid. The wiring harness should have a connection for the ignition switch, a connection for the battery, and a connection for the starter motor. Make sure each connection is securely fastened.
Step 6: Connect the Battery Cables to the Battery
Reconnect the battery cables to the battery. Connect the positive (+) cable first and then the negative (-) cable. Tighten each connection securely.
Step 7: Test the Starter
Turn the ignition switch to the start position and test the starter. The engine should turn over smoothly. If the engine does not turn over or turns over slowly, there may be a problem with the wiring or the starter motor.
FAQ
| Question | Answer |
|---|---|
| What size battery should I use for my John Deere 4020 tractor? | It is recommended to use a 12-volt battery with a minimum of 650 cold-cranking amps for your John Deere 4020 tractor. |
| What is a starter solenoid? | A starter solenoid is a small relay that is located on the starter motor. It provides power to the starter motor when the ignition switch is turned to the start position. |
| What is a wiring harness? | A wiring harness is a collection of wires that connects all the electrical components together in a vehicle. |
| What should I do if my starter motor is not working properly? | If your starter motor is not working properly, you should have it inspected by a qualified technician. They can diagnose the problem and suggest the best course of action. |
| Why is it important to properly maintain my battery? | Properly maintaining your battery ensures that the electrical system on your tractor functions properly. It also extends the life of your battery and prevents premature failure. |
We hope this article has been helpful in providing you with all the information you need to properly wire the starter on your 1968 John Deere 4020 tractor. Remember to follow the step by step instructions and properly maintain your battery and starter motor for optimal performance. If you have any further questions, please consult your owner’s manual or contact a qualified technician.
